Drivetrain loss rwd

Drivetrain loss rwd. Newer RWD cars like the G35 have the electronic control stability system that helps them not to slip. RWD weighs slightly more than FWD, but less than 4WD and AWD. 0 kWh, providing a 6 speed Manual 290 Whp (58 hp drivetrain loss or 16. RWD. 8. Though a loss of traction in a RWD vehicle often leads to oversteer, there's a fun side to this as well. Rear-wheel drive (RWD) and all-wheel drive (AWD) are common options. With AWD you obviously have the FWD losses plus The propeller shafts transfer power to a longer distance in a front wheeled vehicle which leads to greater power loss. Some dynos like the MAHA can load the 30 years experience. now the engine has to work less hard to accelerate at the same rate of speed. Define torque, and explain the relationship between torque and horsepower. RWD automobiles are renowned for their dependability and longevity. This essential component is an integral part of every vehicle. It doesn’t matter what the drivetrain is, acceleration always applies the force in the direction the driven tire is facing. I’ve seen a lot of stock dynos putting roughly 300-330 WHP for RWD but nothing for AWD. Where is that extra 23 HP going? I have done nothing to my drivetrain to change the friction, gear loss, etc. See also Quartz Countertop Weight Calculator. CON– A RWD vehicle is more prone to loss of traction on slick roads and does not perform well in poor weather conditions like rain or snow. orgFwd, rwd, 4wd, awd: drivetrains explained. A vehicle’s weight naturally shifts to the rear as it accelerates. F40Model Year: 2019 + Previous Generations; F20 / F21Model Year: 2012 - 2018. I get what your saying but from a drivetrain loss point of view a RWD car with its long driveshaft will always be more inefficient than a FWD car. Driveline of a rear-wheel drive (rwd) vehicle. Four Wheel Drive (4WD)/ All Wheel Drive (AWD) RWD vs. Within these three categories, there are more configurations to understand. 4. Once the industry standard, a rear-wheel drive system relies on the rear wheels to deliver the power. 6 kWh and a net usable capacity of 59. The 4WD drivetrain system operates in RWD most times which provides less traction. How do you know if your Semi Truck is Rear Wheel Drive? In determining whether your truck is rear-wheel drive, you can use the same method for 4WD. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver Hub dynos lose about 7% of the flywheel bhp on fwd cars and 9% on rwd ones with inline engines where the drive has to be turned through 90 degrees. Car drivetrains are divided into three core categories: FWD stands for front wheel drive, RWD for rear wheel drive, and AWD for all wheels drive. Firstly, only having drive going to the rear wheels means a much simpler drivetrain layout. A longitudinally mounted engine, with the transmission bolted directly to it, sends power via a driveshaft to When I had my car dynoed completely stock the dyno operator remarked at how low the drivetrain loss was, said he couldn't remember the last time he saw it that low. An automatic will consume power in uh, none of them at the moment. 83BHP. RWD is not as common anymore; however, there are still some sport vehicle options that have an RWD feature. Lightweight with centralized mass. A malfunctioning drivetrain can lead to a noticeable loss of power, making it difficult to accelerate or maintain speed. Like AWD, this drivetrain is commonly used on-road. IglooMan · Registered. Front-wheel Drive (FWD) The main advantage of a front-wheel-drive layout is packaging. Log In / Sign Up; Advertise on Reddit; Shop There's definitely a bit more drivetrain loss with xDrive, but it's mostly made up for with being able to put power to the ground (hence the xDrive's quicker 0 to 60 times). That said, a car that’s designed to be fast as AWD or even FWD will likely be just as fast, if not faster than most regular RWD cars. It's also in-between, in regard to weight. Just given the lower power output, thin fluids etc. We'll take one in green Drivetrain Systems: Cars can have different drivetrain systems: Front-wheel drive (FWD) Rear-wheel drive (RWD) All-wheel drive (AWD) or Four-wheel drive (4WD) Drivetrain Loss Calculation. old rwd cars like mine oversteers in the rain pretty readily. However I ask my tuner this same question about 3 years ago and he gave AWD systems lose more power through the drivetrain as opposed to RWD. Around a track, RWD will likely also have an edge due Drivetrain loss is a common topic of conversation in the tuner world because any time you strap your car to a chassis dyno, the output being measured is at the wheel, not at the crank like the published SAE net horsepower figures used by the auto industry. The "diff" is I read somewhere that each time you turn the drivetrain by 90* that increases the loss, so with FWD everything is turning on the same axis so the losses are just friction and inertia. FWD for performance and handling, note critical differences. Through the rest of the corners and elevations, the 2020 BMW M8 Competition Coupe slides around a bit more than in my previous laps, but with very little grip loss. Drivetrain loss on AWD. Jump to Latest 7K views 11 replies 6 participants last post by Devil1 Aug 9, 2008. Beyond feel, RWD also has fundamental mechanical advantages. Understanding the difference between 2WD and 4WD isn’t just for car geeks – it can help you make smarter, safer, and more economical driving choices. This results in An old rule of thumb is: the longer the power has to travel from the engine, the more drivetrain loss a car is going to have. Remember Me? Join us now! Site Navigation. For AWD systems, 20-25% losses through the drivetrain are standard. You may notice this type of sound more frequently when shifting. Rear-wheel drive opens up the possibility of performing both drift turns and burnouts, two automotive tricks that are practically impossible for front-wheel drive cars without flagrant abuse of the emergency brake or cafeteria trays. Differences between fwd, rwd, awd and 4wd Drivetrain awd rwd fwd forecast announcedDrivetrain types Drivetrain vehicles awd cars, fwd, rwd in 2021Fwd, rwd, 4wd, awd: drivetrains explained. Front Wheel Drive 10% loss: Wheel Horsepower / (1 – 10%) = Crank Horsepower We can classify drivetrain systems based on which wheels are driving wheels: Front-wheel drive (FWD), where the front wheels are driving wheels;; Rear-wheel drive (RWD), where the rear wheels are driving wheels; and; All-wheel drive (AWD) or Four-wheel drive (4WD), where all four wheels are driving wheels. Today, most RWD vehicles available are performance cars and pickup trucks. Check the Drivetrain Loss NC Power mods. Drivetrain horsepower loss is the loss of RWD: RWD systems tend to have slightly lower fuel efficiency compared to FWD systems. It consists of the flywheel, clutch, driveshaft, differential, and flywheel. 1. (RWD) All-Wheel Drive (AWD) 4-Wheel Drive (4WD) There is no additional transmission loss or vibration issues associated with angular misalignments up to 5 degrees. It needs time, effort, top-notch car Oversteer potential: While potentially tricky for the inexperienced, experienced drivers can use a RWD car’s tendency to oversteer for spectacular cornering maneuvers and track-day thrills. A drivetrain (also frequently spelled as drive train or sometimes drive-train) or transmission system, is the group of components that deliver mechanical power from the prime mover to the driven components. Less efficient due to drivetrain losses: RWD: Easier on the drivetrain since the drive wheels don’t steer, potentially less maintenance. Not enough to make me worry Furthermore, since there is not an extreme loss in resistance (which would be one reason to do this in the first place for the higher wheel hp number), it would still maintain a high hp loss through the drivetrain as if it were still awd. Commonly found on trucks and performance vehicles, RWD gives needed traction with heavy loads and optimal handling on performance cars. r/ForzaHorizon A chip A close button. For a RWD Dart, take a look at Alan Johnson's NHRA Pro Stock car. For RWD you have to turn the drive by 90* when you get to the rear diff, so that increases the losses a bit more. awd: Drivetrain layouts and what they mean – DigitalTrends; Awd vs. Not shabby, to say the least. The RWD drivetrain provides better weight distribution which eventually enhances the performance and handling of the vehicle. 20% is significant, and energy efficiency in vehicles is a key design point. Register Log In Forums Engine Performance, Mods & Repairs Drivetrain loss: Forums Calendar Active Threads Forum Help: Previous Thread: Next Thread : Print Thread: Rate Thread Page 1 of 2: 1: 2: Drivetrain loss #191244 March 01, 2003 07:42 pm UTC March 01, 2003 07:42 pm UTC: Joined: Feb 2003 Posts: 27 Toronto. The biggest advantages to RWD are weight distribution and handling dynamics. What is RWD? RWD or rear-wheel drive means all the power is sent to the rear wheels. Fwd vs. Some race car drivelines have SFA loss compared to a road car. While it is sending power to the front, I would have thought that there would be more drivetrain loss since in that case (the case a dyno would see) power would go to all 4 Driveshaft Replacement Cost. Durability. 2WD Vs 4WD. Over the course of the vehicle's life, this can lead to To find out, CarWow tested an M8 Competition in RWD mode against the king of all-wheel drive hyper hatches, the Mercedes-AMG A 45 S, for a series of performance tests. When comparing RWD vs. Years ago, I needed to educate myself on drivetrain losses while heading a rulebook committee for a local racing series that wanted to use dyno tests to measure engine output and then convert the results to net horsepower. RWD cars on average are 20% loss through the drivetrain. Drivers of RWD vehicles must exercise caution and adapt their driving style when facing inclement weather. [1] This excludes the engine or motor that As a rwd wrx owner/driver i guess i can help out a lil bit. Sort by Oldest first Oldest first Newest first Most reactions. In cornering, RWD outperforms FWD due to better traction and control. Clunking Noises. The four different types of Since the front wheels aren’t powered, this type of drivetrain can offer excellent steering and cornering in dry conditions. Drivetrain loss depends on the efficiency of these components. Jason Smith OP Member Jason Smith Drivetrain layoutsDrivetrain driveline efficiency quattro losses car vehicle engineer drivelines Fwd, rwd, 4wd, awd: drivetrains explainedDifferences between fwd, rwd, awd and 4wd. The greater power loss leads to better fuel economy, mileage and acceleration. Vehicle Drivetrain | Image Source: We will explain two possible engine and tyre combinations which are the most commonly used ones. Everyone offers remarkable advantages so understanding your requirements can assist you in sharpening your pursuit. With the weight of the car more evenly balanced, the feeling of acceleration is significantly more palpable, making for a more invigorating driving experience. Show Printable Version; 06-25-2013, 07:29 PM #1. If possible find a dyno that PRO– The weight of the drivetrain on a RWD vehicle is spread more evenly so it has better balance than a FWD vehicle. Vehicles that feature rear-wheel drive are a bit more complicated. However losing wheels weight has diminishing effect on drivetrain loss after a certain weight loss. And in winter conditions, RWD cars can dig a hole for themselves and get stuck in the snow. When in 2WD drive mode, the driveshaft, half shafts, the The all-wheel-drive system eliminates the main issue of both the FWD and RWD platforms – the loss of traction. BTW, the commonly accepted drivetrain loss on the 03 Cobra is 15%. Drivetrain loss is the power that the engine generates that doesn’t make it to the wheels because it’s sapped by the components of the drivetrain system. loss of power to the wheels and even a complete breakdown, potentially leaving you stranded. This means that the engine does spin the rear wheels and they are the ones powering the car’s motion. You may have to register before you can post: click the register link above to proceed. In simple terms, powering one pair of wheels uses less fuel and power compared to powering all four wheels. With more drivetrain loss, the car will need to stress more to reach the same speed compared to a lighter wheels, petrol burns faster and brake slower. If you partially lose traction from the driven axle, you do not lose traction for steering. 8 results: The drivetrain losses seem close to the 10-12's on the 3. Devil1 Discussion starter 2002 posts · Joined 2008 Add to quote; Only show this user #1 · Aug 7, 2008. Think about how quickly drivers get on the throttle out of corners in the dry. The issue arises from the fact that when RWD vehicles lose traction at the rear wheels, the car’s back end can swing out, a phenomenon known as oversteer. See also How Much Is A 1/8 Teaspoon In Grams? How high could a 1 hp motor lift 550 lb in one second? A 1 horsepower motor could lift 550 pounds by 1 foot in 1 second. Immediate repair is recommended to prevent these Switching to RWD for rolls when you have AWD is dangerous and not worth the risk for the difference in drivetrain loss. 3whp. Weight is also a thing but that more or less is for acceleration. I know there's no way to really be 100% but what percentage would be the most accurate number to go by? 10-19-2011, 11:08 AM To this question, there are quite a few perspectives to answer the question from. Better weight balance. True, you still have the extra weight of the front running gear, but you lose most of the parasitic drivetrain loss and can perform RWD antics. The power is transmitted from the engine to the rear wheels, resulting in increased These acronyms refer to where the engine's drive power hits the road—via all wheels (AWD), the front wheels (FWD), or the rear wheels (RWD). We stress the importance of thorough preparation and research. RWD provides dynamic driving with controlled drifts. Regardless of how much power the engine makes, there will always be some form of parasitic or drivetrain loss, and if the driveline setup of a 400rwkW engine is the same as when it was making 200rwkW has not changed, Subaru drivetrain loss: AWD vs RWD. Then tell me the drivetrain loss is the same on a RWD converted car as an AWD car. i was told our 2013 ram with 395 hp is For most bnb cars, every 0. RWD vehicles have poor performance in slippery conditions as they are prone to loss of traction. of torque. Maintenance cost is high due to an increased number of moving drivetrain components. RWD is fun when its dry though, I love the feeling of how it pushes you through corners. it was interesting to watch every car and truck go in to dyno there rides. Drivetrain losses will get higher as load The driveshaft, also known as the propeller shaft or driveline, is a part of the drivetrain that transmits power and torque from the engine to the differential which then transmits it to the wheels. Drivetrains enable cars to move by connecting engines to wheels. A rear-wheel drive layout does come with some compromises compared to FWD: Less interior space: RWD cars need room for the Rear-wheel drive (RWD) Rear-wheel drive – also called RWD – is the older car drivetrain layout. After fruitlessly Googling and sifting through endless threads polluted with half-truths and See more The calculator determines the wheel horsepower by subtracting the drivetrain loss from the engine power. The best way to describe the difference between AWD and 4WD is the centre differential, or lack thereof, but lets go drive a rwd vehicle, not a 4x4 in the snow. This efficient charging capability makes the Onvo L60 RWD a convenient option for long-distance travel. You said in RWD your force is applied in the direction of momentum which is completely incorrect. Check Details. RWD offers superior balance and handling with rear-wheel power delivery. For the original topic of this thread -- drivetrain losses are not static and increase at higher loads but for the purpose of general broad stroke calculations, modern RWD BMW's are in the 12-15% DT loss range whereas AWD platforms sit in the 18-21% spectrum. It takes more to produce more, and for some the setback is too much. Keep in mind that the drivetrain loss is about 2-5% higher in cars with automatic transmissions. Keep this in mind when you see a 4×2 pickup truck, which is a four-wheeled vehicle with just two wheels powered, typically the rear, which would make it a rear-wheel drive (RWD) pickup truck. , combined with quality DANA/Spicer Neapco parts is the & wer. My question is, the 05 sti is rated at 300 hp, what does this translate to at the wheels, and is there a difference between drivetrain loss from rwd, fwd and awd. But I still feel that the Skip to main content. Parts That Make A Drivetrain At times, one would have heard people talk about drive trains and an assortment of abbreviations associated with them such as 2WD, AWD, 4WD, RWD, and others. For instance, a mustang typically has 18-22% drivetrain loss just due to how far that rotating energy must travel (rwd) an AWD must travel that distance 4x, hence the most drivetrain loss of all. 5kg loss gain around 0. RWD has been in the vehicle for many years since 1885. Start by visually inspecting the drivetrain components RWD is also designed for better weight distribution. I haven’t seen any figure quoted or any mention of drivetrain losses with EVs but they do The type of drivetrain a vehicle has—front-wheel drive (FWD), rear-wheel drive (RWD), or all-wheel drive (AWD)—significantly influences drivetrain losses. Also known as drivetrain loss, this refers to power lost by the engine from the time it travels through the transmission to the driveline, and through the axles to the wheels. Save Share Reply Quote Like. 83. ; In the following section, we shall learn to calculate Although RWD and AWD are two of the most popular drivetrain options available, front-wheel drive (FWD) is another noteworthy drivetrain available in many modern vehicles. Car companies make cars, and the engine powers two or more of the wheels. This generally means greater drive-train power losses compared to FWD. AWD On Ice. freaky57fast. In some cases, the clunking could just be a worn-out U-joint. Take out the 40lb/ea wheel assemblies, 12lb rotors, wheel bearings, axles shafts and wheel hubs. This conversion will increase the performance of your 911 by removing nearly 82lbs of weight while simultaneously reducing the amount of drivetrain loss. The front wheel rolling loss is not taking power on the 2WD dyno, but it is on the AWD. However, RWD vehicles may not Usually manual, automatic, rwd, and awd cars all have pretty much a set drivetrain loss figure, but for something as complex and "efficient" as the GT-R, is that figure very low or is it still high due to the awd? I'm just curious so I can calculate the AWHP from the crank/brake hp and visa-versa. 95 rwhp and 537 lb-ft. Prior to the 1970s, RWD vehicles were the most prevalent since there wasn’t a cost-effective means for the front wheels to both steer and rotate the front axle. or rear-wheel drive (RWD), leading to slightly reduced wheel horsepower. A 300whp and a 400whp STI cruising down the street should have roughly the same drivetrain losses since they are using the same amount of power. Hennessey dynoed the car a second time after making some exhaust mods and was able to raise those numbers to 574. #2 moosedks, Apr 14, 2014. Engine horsepower is measured at the flywhee. There are 4 drivetrain AWD, rwd, fwd, 4wd Front wheels are powering the front drivetrain in RWD mode. (Think civic type R versus your grandmas Buick) Re: Drivetrain Loss (JimLill) Jim, This is all off the top of my head, but I think the drivetrain loss on the dyno will be composed of two parts: one that is a steady state frictional loss and another that is related to how fast the dyno accelerates the drivetrain (and what gear the car is tested in). But whenever I see dyno info on cars like mine the base runs for hp are right around 169-170 WHP or about 200 crank hp for 15% loss and around 160 lb-ft at the wheels, or about 188 lb-ft at the crank. I'm not sure if the flywheel/clutch/pp are bolted on when Trouble shifting gears or slipping gears is a common symptom of transmission issues, a key part of the drivetrain. Get app Get the Reddit app Log In Log in to Reddit. The conversion cost and process are not for the faint-hearted. And I have some questions i havent been able to find answers to too. Let’s talk about the differences between FWD, RWD, AWD and 4WD When looking for a new vehicle there are several things to take into consideration. hope this helps. So what is our percentage of hp loss for an AWD? Save Share Reply Quote Like. RWD cars generate the power at the front and that power has to be transmitted to the rear wheels by making a 90-degree turn in the differential. With the engine mounted the way it is, you can't do that without completely shifting stuff around; lol. I still don't think it's a good idea. 0T's are about 5-9% less than the 10-12's 2. Diagnosing Drivetrain Issues. However, RWD vehicles may not perform as well in adverse weather conditions as AWD systems since they can struggle with traction on icy or wet roads. rwd once you hit the gas too hard for the surface a you sink in, b you lose control of the the rear. 60kWh. This will improve the driving dynamics RWD: 10-18% loss; AWD: 17-25% loss. Thread Tools. Finally, and arguably most importantly, RWD cars have the quintessential sports car feel. Compared to FWD and RWD vehicles, AWDs have the best traction, making them a popular choice in regions with heavy For most bnb cars, every 0. RWD is used for most race cars, so take that however you want. If FWD “pulls” the car to go forward, then RWD “pushes I am researching on everything there is to know about the STI as Im pretty convinced this is the car for me. Rwd vs fwd: differences in towing, rain, snow, drifting, and moreRear wheel drive vs front wheel drive Drivetrain rwd awdDrivetrain driveline efficiency quattro losses car vehicle engineer drivelines. 4x4 will be better off the line for a drag but due to the increased transmission losses in the drivetrain the RWD would take it on a roll to disengage the AWD after 2nd gear would be a perfect compromise between maximum off the line traction and minimal drivetrain loss. lets see how far you get with a rwd and open diff. Front-wheel drive. Given that, it should come as no surprise that the Ford Mustang uses a RWD drivetrain. Still, the NC, and even more the ND, do really well with keeping things low-friction where possible. I generally go by 20% RWD and 40% AWD, but it's only a very rough guide. Also, AWD would only give a real advantage in the rain. The high-capacity battery has a gross capacity of 60. Like I said before, it will not be as efficient as a true RWD trans, such as a T56, but more efficient at the wheels than the AWD. The tire losses are a big deal on a tire coupled dyno. less power loss than 4wd/awd rwd cons: slightly more weight that fwd. Ưu điểm RWD. Transfer box is still working, even if the clutch is open. Visual Inspection . This makes our regular inspections a key aspect of owning a FWD vehicle. (meaning if the HP rating at flywheel is 200 then WHP should be rught around 170 WHP) I've also heard that for our cars with AWD is around 27. There’s no need to send power to the rear wheels via a long driveshaft, the vehicle’s drivetrain is much more compact and it doesn’t intrude as much on cabin space. Each has advantages and disadvantages and it’s important to understand the differences. This is what the terms above mean. 2022 New Full System Scan Tool Launch X431 V 4 0 31 Service Functions Auto Diagnostic Scanner Tool Ecu Coding Autoauth For Fca Sgw Vag Guided Functions China Auto Diagnostic Maybe im just acustomed to break hp but there is no way you lose 40 hp in drivetrain loss on rwd car Yeah, my thought was that you wouldnt loss that much because those drivetrains arent "heavyduty enough" for n/a 2. Expand user menu Open settings menu. The rest of the straight (and next braking RWD is the oldest type of drivetrain. On the other hand, Rear RWD offers that without effort. As Thanos says “Perfectly Can cause understeer where front wheels lose traction and car drifts outside of the turn. It'd take a whole hell of a lot of work to make it RWD, and then add in the drivetrain loss, you'd be at like 120 hp. Maintenance and Condition: Well-maintained components can reduce losses RWD can't be faster off the lineyou're fighting for traction in rwd. J. Drivetrain loss varies by transmission type This can result in less stability and lead to a loss of traction when driving on slippery surfaces. Advantages Comparisons of Drivetrains - FWD, RWD, AWD by Ian Swan on December 03, 2015 Oversteer is when the rear end comes loose because the rear wheels lose traction and this can make the vehicle lose control. Once we t Side by side comparison of the RWD vehicles may also be more receptive to feedback from the driver, further improving the driving experience. And for similiar reasons stated above, has lower drivetrain losses than RWD (3 driveshafts, 1 differential in a RWD car) Rear Wheel Drive (RWD) Enthusiast worship RWD, it is the most revered of all the four set-ups. The drivetrain introduces losses in power transmission due to various components. When things get rainy or slippery, however, RWD vehicles can lose traction. RWD’s controlled RWD is the general term used for rear-wheel drive systems on all makes of passenger and commercial vehicles. 5kg gain at wheels losses around 0. Drivetrain Components In RWD vehicles, the drivetrain transfers power from the engine exclusively to the rear wheels, with the front wheels serving only for steering purposes. In this geometry, The rear wheel does the driving part whereas the front wheel takes up the steering. For example, advantages to the vehicle manufacturer of using transmission + engine types that are already developed and have passed emissions (Notice that manufacturers seem to use variants of the same engine for multiple vehicles) or are lower cost, may not include any This is typically also the drivetrain configuration that suffers the fewest parasitic drivetrain losses, which means it tends to be the most fuel efficient choice. Whats the deal with the stock hp and torque figures with our cars. I’d be genuinely shocked if it was anywhere near 20% nowadays. View Profile View Forum Posts View Blog Entries Member Join Date Feb 2013 Location michigan Posts 236 Black 2002 WS6 A4, 2010 ram. The Dart SRT4 should be out in Web Rwd has more drive-train loss than FWD but less than AWD. I believe drivetrain losses are not constant and dependent upon power input. Awd is definitely faster off the line After that though, rwd has less drivetrain loss and is faster RWD cars also tend to excel in terms of fuel economy compared to AWD, as they typically carry less mechanical complexity and weight, resulting in less power loss through the drivetrain. Honda Civic), front-engine Should FWD drivetrain swaps be added? I know that very few cars, if any, would benefit from this. 7%) (2010-12: 15. rwd vs. Anyone know the percentage of loss from crank to the wheels on these cars? I'm trying to get a fairly accurate guestimate of what I'm putting down. Engine hp was 193 and rearwheel hp was 163. A More typical was a loss of between 13 and 19 hp between 3,600 and 5,900 rpm (see Test B). 5% drivetrain loss. on my car I am running the Stance gr+pro ssd coilovers with 12k/10k springs Learn More: FWD, RWD, AWD, 4WD Drivetrains Explained. One set of tires for delivering power and one set for steering means you are less likely to run out of grip in a turn. I. As the name suggests, it transfers the engine’s power to the rear wheels. Nowadays, RWD is becoming less common. that are commonly used in RWD differentials, losses in the 6 to 10 percent range are Engine and drivetrain of a transverse-engined front-wheel drive car. A classic example of AWD loses more to drivetrain losses (which is what Paul is describing). RWD? Which drivetrain is right for YOU? Which is more fun? Drifting? Drag racing? Which drivetrain is the easiest to maintain? Which dri This results in an effective charging speed, including time lost, of 153 kW, with each charging session taking about 27 minutes and 44 seconds. We’ll be taking a closer look at the workings of drive trains in this article. If there was a 20% difference only heavy duty work vehicles where AWD is absolutely necessary would have it, not every SUV and many cars. Understanding drivetrain loss is vital in numerous contexts, particularly: Automotive Engineering: Engineers utilize this data to refine drivetrain components, improving efficiency and overall vehicle Drivetrain Loss Percentage is the percentage of power lost due to the drivetrain, expressed as a decimal. It has more drivetrain parts that move hence increased maintenance cost. At the opposite end are the all. If your drivetrain loss is 17% of BHP, the your RWHP=BHP-0. more parts to break, also generally more complicated. Correct me if I'm wrong, but we have three differentials, whereas FWD and RWD cars only have one. All-Wheel Drive (AWD) gives you the power in all four wheels, offering more traction and better control in slippery conditions, ideal for off-roading and snowy roads. 75. Jason Smith OP Member Jason Smith I know there are rough estimates for drivetrain loss for fwd, rwd, awd cars, but with changes in technology, etc, they do vary from car to car. Help/Rules: Calendar: Help/Rules: Calendar : NC Power mods A few more %age is lost in RWD, because there's at least one gear needed that meshs perpendicularly to the driveshaft. Unless a car doesn’t have the power to spin the wheels IE: some D-B class cars could be better off with other upgrades with their available PI. This means there’s a 10% loss of power when transferring energy from the engine to the wheels. My guess is roughly 270-300 WHP depending on dyno, elevation, gas quality, etc 10-17-2020, 05:20 PM #4. It gets its name from the fact that the engine sends its power to the rear axle of the vehicle through a transmission. Drivetrain layoutsWhat is rear wheel drive (rwd) in cars? it's design IWSTI Engine & Drivetrain. I'm too lazy to figure out the percentage drop. RWD Disadvantages. Also do the GTRs suffer more as they are AWD or less? Thanx in advanced hi , i recently just went to a dyno day one town over from where i live at Jannetty racing . To start viewing messages, select the forum Honestly, use whatever you want - its not a consistent % loss, and everyone is going to have their own opinion. In this drivetrain, the power is sent to all four wheels, which improves traction, especially on slippery surfaces. Some vehicles are easier to convert due to their design or available aftermarket In a FWD vs RWD showdown, can a winner be declared? Discover the advantages and drawbacks of these popular drivetrains. AWD has too much benefits not to use on pretty much everything sadly. G42Model Year: 2021 + F44Model Year: 2020 + Previous Generations; F22 / F23Model Year: 2014 - 2020. Click to expand Power is power, regardless of weight. You can think of it as if every mechanical bit between the engine and the wheels is adding to the frictional effect. The increased weight and mechanical losses associated with this system can impact acceleration, handling, and fuel efficiency EDIT: Talking specifically about drivetrain loss as in how much or what percentage of the power transferred from the electric motor to the wheels is lost. For the record RWD Drivetrain loss. 0T's for both auto and manual (which is an amazing improvement considering the Rear-wheel drive (RWD) was the first drivetrain system used in an automobile. Seems reasonable and consistent. Rear Wheel Drive (RWD) drivetrain is the complete opposite of the FWD Drivetrain. #drivetrain #. Plus there is oil churning and frictional losses. FWD vs. FWD is generally more stable and predictable than RWD in low traction conditions. weight is higher. Otherwise, you may part with more than $25,000 to convert your FWD to an RWD car. One of the most important is to find the right drivetrain for you. The FWD system loses about 10% of its power, while For example, on a rear-wheel drive (RWD) vehicle, the drivetrain consists of: clutch (or torque converter), gearbox (manual or automatic), propeller shaft, differential and drive shafts. That's the only time during the lap they'll be seeing an advantage. According to DragTimes, if you factor in a 13% drivetrain loss, the new Viper is actually making around 615 horses. No The mechanical losses in an automotive drivetrain can vary widely depending upon the type of transmission used, and at what conditions the drivetrain losses are measured. Think of it the same way as the engine losing some of its power to keep itself running. rwd – Just how much quicker is one compared to the other? – AutoEvolution; Final Thoughts. AWD: Drivetrain layouts and what they mean By Ronan Glon Updated March 11, 2021 Every car regardless of price, performance, and body style is either front-, rear-, or all-/four But there’s a larger percentage of drivetrain loss from RWD to AWD. Fuel Efficiency: RWD on the other hand is simpler, and can be argued to give better balance and control near the limit, as the front wheels aren't being asked to both drive and steer, which Differential losses tend to be considerably larger, especially in the case of RWD and AWD vehicles where the torque path is turned 90 degrees as it enters the rear diff and With combustion cars, drivetrain losses are usually quoted to be about 15% for RWD and 20% for AWD. For example, if a car has 350 WHP and a drivetrain loss of 15%, the HP can be calculated as: Drivetrain Layout: FWD, RWD, AWD have varying loss percentages. Pros. Which Drivetrain Type Would It Be Advisable For You To Purchase? Now that you know the fundamentals about the difference between FWD, RWD, AWD, and 4WD, ask yourself which sort of drivetrain you think checks out for you. By transferring engine power to the rear wheels, the weight on the rear is increased even further, resulting in better traction during acceleration. I don't know the exact number, but from an engineering viewpoint I can tell you this is untrue. Particularly in FWD configurations, the shortened distance between the engine and the driven wheels reduces energy loss, a benefit that RWD systems aim to replicate with more efficient driveshaft designs. Head over to DragTimes to see the graph. Of course he did upgrade the motor to a 500 CI V8, along with a frame and everything else with the exception of the body, LOL. View Profile View Forum Posts Is Enabled BMW Tech Expert. The Audi AWD systems are WRC's use 4x4 where there is an advantage on loose surfaces where grip is at a premium, however even here if the regs were open, wide specialised tyres on one axle applied Traction in Poor Conditions: RWD cars can struggle for traction in slippery conditions, requiring skillful driving or additional traction control systems. The efficiency of the drivetrain has a significant Rwd has more drive-train loss than FWD, but less than AWD. So, I converted my 07 sti to rwd using a rocket rally 2wd center diff and 05 transfer gears. FWD? AWD vs. The average driveshaft replacement cost is between $300 and $800. 3whp, 0. some based upon historical data, others based upon heresay, and a few based upon what makes them feel good. AWD Drivetrain loss. Now if I work my engine up to 350 HP, 18% loss equals 63 HP. A good manual transmission can be over 99% efficient, and a good hypoid final drive can be over 98. The accompanying charts reveal that the average power loss with just the simple Essentially you can probably apply the 8-10% loss for FWD, 12-15% for RWD and 15-20% loss for AWD to modern cars and be fairly close. S4 / RS4 (B5 Platform) Discussion - What is the drivetrain loss percentage for Quattro? - I heard that for FWD and RWD vehicles it's about 15% loss. And has a better stability. 2605 A drivetrain (also frequently spelled as drive train or sometimes drive-train) or transmission system, is the group of components that deliver mechanical power from the prime mover to the driven components. Typically, RWD power loss is around the 15% mark, whether through a manual or automatic transmission. Rear-wheel drive, commonly known as RWD, is a propulsion system where the engine’s power is directed to the rear wheels of a vehicle. Here’s why: You paid for AWD and typically drive AWD so switching to RWD would change how power is applied to something unexpected. While AWD can work, RWD simply delivers the classic drift sensation that I‘m personally chasing. BHP=RWHP/0. While RWD sends power to only the back wheels of a vehicle, FWD delivers added power to the front wheels, making them a good choice for city-driving or on the highway. Drivetrain types rwd drivetrains automotive different awdDrivetrain rwd awd Drivetrain losses (efficiency) – x-engineer. i am curious if anybody dyno there stock truck or modified one . It'd take a whole hell of a lot of work to make it RWD, and then add in the drivetrain loss, you'd be at like 120 hp. The world's first car was I'd like to see what the actual anatomy of the AWD system is before trying to determine if much drivetrain loss is recaptured in RWD mode. AWD loses more to drivetrain losses (which is what Paul is describing). It seems some of the new high-end performance cars, like the BMW M5, upcoming M3 and Mercedes-AMG E 63, have a mode that will disconnect the front axle. That would give a total drivetrain efficiency of 97. This can lead to a loss of control, especially during cornering or sudden maneuvers. RWD cars also tend to excel in terms of fuel economy compared to AWD, as they typically carry less mechanical complexity and weight, resulting in less power loss through the drivetrain. Nhược điểm trên hệ dẫn động cầu trước – Front Wheel Drive đều là ưu điểm của RWD và ngược lại All in all, it is quite costly to convert an FWD drivetrain to an RWD drivetrain. The RWD or what we like to call it the ” Right Wheel Drive” is the most tried and true drivetrain setup of all. 83 or 482BHP. Dyno testing and "drivetrain loss" Other Vehicles & General Automotive Discussions follow ft86club on our blog, twitter or For a 5spd car it's usually in 4th gear on the dyno for the whp. I'll start this off with a little preface; At this time, there are no awd dynos available for public use/tuning in Alaska. less grip than 4wd/awd awd pros: mo grip awd cons: power loss through drivetrain is higher. 5%. Modern drivetrain components are being designed to reduce friction and rotational mass, resulting in better fuel efficiency ⛽. 80, and 4x4 trucks (a form of "awd") even had a 33% loss, or 1/0. Drivetrain loss is a common topic of conversation in the tuner world because any time you strap your car to a chassis dyno, the output being measured is at the wheel, not at the crank like the published SAE net horsepower figures used by the auto industry. For example – you have a car They way I always heard people talk about drivetrain loss was by, fwd about 5-8% loss, rwd about 10-12%, and awd 15-18% loss. 5. This type of drivetrain was widely used in the 20th century. You can think of it as if every mechanical bit between the engine and the wheels is adding to the Let’s set the record straight on the drivetrain losses in All-Wheel-Drive, Rear-Wheel-Drive and Front-Wheel-Drive cars. A drivetrain gear stick for 4WD cars. Hub dynos lose about 7% of the flywheel bhp on fwd cars and 9% on rwd ones with inline engines where the drive has to be turned through 90 degrees. diff, lubricant, stall converter, etc) and drivetrain The driveshaft, which connects the front engine to the back axle, adds more weight. Drivetrain type drive loss percentage; Front-wheel drive: 10%: Rear-wheel drive: 15%: All-wheel drive: 25%: How to calculate hp to whp? To convert horsepower (hp) to wheel horsepower (whp), you can use a conversion factor that takes into account the drivetrain losses. Note the drivetrain setup in the Side by side comparison of the entire drivetrain (engine, transmission, suspension etc) from both a 2017+ Fiat 124 Spider and 2016+ ND Mazda Miata. RWD provides power and control around fast corners without losing traction. Bimmerpost ☰ Model Selection. There is no need for extra Still the classic, rear drive was basically the only drivetrain system for many years. How much torque is lost through drivetrain? Approximately 15-20% of torque can be lost through the drivetrain due to friction and other losses. The two that I know of are at a college and an emissions testing center. 0L engine to cause 20% loss, was thinking more like 10-12%. By understanding how each of these systems works, you'll be able to choose the best one for your needs. If I am doing a U-turn in the rain about over 7 miles per hour, my rear tires would break lose. If you already have an RWD engine it would be cheaper to convert your FWD car to an RWD car. If you want to stay conservative with your flywheel *estimates*, then use a lower drivetrain loss % (15-17%). It may be more beneficial for top speed as the car is heavier, its more stable, but Does BeamNG simulate power loss from transmission and drivetrain to determine wheel horsepower/torque? As far as I noticed from engine debug UI app, the wheel torque and engine torque is almost the same at all times on 1:1 gear ratio meaning that there is no transmission and drivetrain loss (or if there is, it is very insignificant). This can reflect on the speed of the vehicle, but it also reflects on the fuel consumption. Generally, FWD vehicles lose about 10% of power, RWD around 15%, and AWD can see losses up to 20%. Rear-wheel drive. The rollers are not flat and lose even more power than tires rolling on a flat road. The secret lies beneath the surface, hidden within the heart of your vehicle’s drivetrain system. If I understand this correctly, that loss is due to friction, gear loss, etc. wheel drive is most used in Indian vehicles, as it is more fuel efficient. g. With the dual role of steering and propulsion, FWD vehicles may face more wear and tear on specific components like CV joints. Jason Smith OP Member Jason Smith Register Log In Forums Engine Performance, Mods & Repairs Drivetrain loss: Forums Calendar Active Threads Forum Help: Previous Thread: Next Thread : Print Thread: Rate Thread Page 1 of 2: 1: 2: Drivetrain loss #191244 March 01, 2003 07:42 pm UTC March 01, 2003 07:42 pm UTC: Joined: Feb 2003 Posts: 27 Toronto. Awd vs rwd Drivetrain awd rwd fwd forecast announced Powertrain vehicle ev drivetrains components engine awd system experts auto drivetrain car drive rwd explores transformation industry fwd Drivetrain driveline efficiency quattro losses car vehicle engineer drivelines. Is Rear-Wheel Drive Good For Snow? FWD vs. Horsepower at the crank is different than horsepower at the wheels mainly due to parasitic loss. Read on for a more in-depth look at each of the drivetrain layouts. However, from a roll, good chances are the RWD will be faster due to the added weight and drivetrain loss/inertia of the AWD. These all attribute to. 5 HP. What is the difference between hp and whp? The difference is where the power is measured. Expect the risk of sliding off or losing control when using RWD on a slippery road. also since most cars are light in the rear you have no weight too force the rwd down to the road, unlike fwd. Two-wheel drive (2WD) sends power to either the front or the rear wheels of a vehicle, while four This is why most sports cars such as the Corvette and Camaro are RWD and are more exciting to drive. In a drag race held in damp Engine HP vs Wheel HP. Rolling roads driving through the tyres are The engine’s power is transferred to the wheels by the drive train. Allowing the drivetrain to continue vibrating will lead to damage of other vital components. what kind of numbers did you get ? i was told you lose 20 % power loss from tranny to rear wheels. Whatever the cause, you should RWD nhận năng lượng từ động cơ thông qua trục các đăng đi thẳng xuống 2 bánh sau và giải thoát cho việc điều khiển đánh hướng cho 2 bánh xe trước. The amount of horsepower that reaches the wheels, and thus, the pavement, is reduced by the inherent friction and mechanical inefficiencies within the drivetrain. (RWD) 13 Ring gear 11 Spiral bevel gear 6 Spur gear 5 Sun gear 11 Torque 2 Torque converter 11 Transaxle 13 Transfer case 16 Transmission 8 Universal joint (U-joint) 14 Worm gear 6 KEY TERMS After studying this chapter, the reader should be able to: 1. . With RWD, it's also much easier to create a car with neutral balance, where weight Enter the wheel horsepower and engine horsepower into the calculator to determine the drivetrain loss. Drivetrains awd rwd fwd4wd awd differential driveshaft failing signs Car drivetrain awd axle fwd train wheels rwd 4wd drive wheel systems audi do transmission turn explained Drivetrain loss; If this is your first visit, be sure to check out the FAQ by clicking the link above. What is the real number? I want to do a poll and see what the majority of peoples think is the correct number. Loss of Power. Rear wheel drive vs front wheel driveDifferences between fwd, rwd, awd and 4wd What is rear wheel drive (rwd) in cars? it's design and featuresDrivetrains awd rwd fwd. Everyone seem to have a different opinion from 15% to 20%. More typical was a loss of between 13 and 19 hp between 3600 and 5900 rpm see Test B. You can have front-engine FWD (e. As a rule, sports cars with powerful engines, such as the Dodge True. It means that the engine torque is transferred to the rear wheels. About Car Drivetrain System. Rwd carbiketech explained typical diagrams Vehicle drivetrains: a comprehensive guideFront and rear-wheel drive are two transmissions present in Differences between fwd, rwd, awd and 4wdPowertrain vehicle ev drivetrains components engine awd system experts auto drivetrain car drive rwd explores transformation industry fwd group driveshaft Drivetrain losses (efficiency) – x-engineer. 3. When it comes to driving experience, RWD offers a more engaging driving feel, especially in dry Th correct relationship beteen BHP and RWHP is as follows: BHP=RWHP + Drivetrain Loss. I haven’t seen any figure quoted or any mention of drivetrain losses with EVs but they Losses result from bearing friction, inertia of the rotating components and oil drag in the transfer case and differential. This setup provides better weight distribution and handling since the rear wheels are responsible for propelling the car. 40 to 120 the RWD should be a bit quicker unless it's losing tractionthis is all assuming straight line performance. The front wheel loss is there, even with 2WD, when the vehicle is moving down the road. 85) = 705 If you want 600 wheel horsepower you need a turbo that can support 705 crank horsepower. The drivetrain loss factor is based on the type of drive: Front-Wheel Drive Drivetrain loss directly affects a vehicle’s performance. RWD vs. This drivetrain system is also known for its durability and ability to handle heavy loads. 4%) 3. With combustion cars, drivetrain losses are usually quoted to be about 15% for RWD and 20% for AWD. That's because they have the least amount of power loss when transferring power from the engine to the wheels since the engine is located close to the wheels and is at a perfect angle. Jason Smith OP Member Jason Smith Dream on, MoPar fanboy 4wd systems in the 2000s and earlier were pathetic back then (due to weight and significantly higher drivetrain losses), especially compared to rwd most awd systems had a 25% drivetrain loss after adjusting for wheel power, or 1/0. The force is still directed the direction the hood is facing, but the added power to the tires pushes them beyond their Key expenses include purchasing a compatible RWD drivetrain, custom fabrication work, a new transmission, differential, custom driveshaft, and possibly extensive modifications to the car’s chassis and suspension systems. Yeah xdrive is definitely more efficient at putting the power down from a stop. FWD is like 15% and AWD is like 35-40%. The system used for RWD is the transfer of torque from the propeller shaft via transmission to the rear wheels. RWD stands for rear-wheel drive. 6spd cars usually are 5th gear dyno run. DVelasco68. While both have pros and cons, they can impact performance, efficiency, and overall driving experience. Only now, that 220 hp (out of my ass) is only coming through two wheels instead of four, thus hindering the machine to a much less efficiant These RWD conversion spindles will allow you to remove your front axles, differential, and driveshaft allowing you to convert your AWD 996 or 997 to RWD. So your example of the 400RWHP car would really have 400/0. Of course, the price is higher if you have an all-or four-wheel-drive vehicle that requires extensive repairs. the 325i/ci comes from BMW with a stated 184HP and 175lb-ft. orgDifferent types of drivetrains in a car, 4wd, awd, rwd. Front-engine front-wheel drive and front-engine rear-wheel drive. Appreciate 0 Quote 06-12-2012, 10:37 AM If the stock motor is 225 HP and I loose 18% to drivetrain loss, that is 40. Clutch Kit Disc, Plate, Bearing & Toolsupplying automotive & truck drivelines, need help call 800-216-1632 & talk to our Driveline Expert How To Calculate The Correct Target Horsepower. RWD systems also offer high towing and payload capacities, which is why they’re so often found in high-end pick-up trucks. Open menu Open navigation Go to Reddit Home. Considering that slipage in the driveline amounts for losses of about 10-15 percent, I can only imagine that the real power at the crank of the BMW M5 Competition is closer to 660 horsepower than Power loss being even higher in applications with automatic transmissions; To calculate for RWD drivetrain loss divide 600 / (1 – 15%) or 600 / (. Describe the various gear types and their As electric vehicles (EVs) continue to rise in popularity, the question of what type of drivetrain is best for them becomes increasingly important. So, for example, my AWD WRX is losing a greater percentage to drivetrain losses than a RWD BRZ. While it may seem daunting to DL = drivetrain loss; Drivetrain loss based on selected type. rwd pros: mad drifts and other actual strategic advantages to power over. Each drivetrain has their own characteristics and pros and cons. Whenever I hear someone talking like that I feel like, Because most of them are idiots, but i am glad this is an informative thread on the subject. Ive tried a search and come up short. However, my WRX still ends up with a higher wheel horsepower There are four different ways to set up the drivetrain: front-wheel Drive, rear-wheel drive, all-wheel Drive, and four-wheel Drive. RWD, or AWD—presents a unique drivetrain loss percentage, which must be accounted for when converting WHP to HP. The point is: Same setup, but one is AWD, one is RWD/FWD, AWD will lose more power. AWD. engine efficiency goes up, drivetrain loss goes down. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver power to the drive wheels. That includes the average price for parts and an additional $150 to $200 for labor. This can be extremely helpful in the winter time - a little bit of wheelspin from the driven axle to keep momentum up, but 10% drivetrain loss is absurd in a RWD platform, not sure why anyone is engaging this guy after he said that. Fwd vs rwd vs awd vs 4wd. E81 / E82 / E87 / E88Model Year: 2004 - 2011. 2. Before we get into those we’ll take a look at the parts involved. Because the weight is more evenly distributed with a RWD drivetrain, they tend to provide better handling, although not in slippery conditions. There are of course going to be exceptions to this Drivetrain loss describes the power lost between the crankshaft and the wheels. Join Date Jul Drivetrain Types Difference Between FWD, RWD, AWD, and 4WD Drivetrain Loss Awd This factor varies with drivetrain type; Distributing power to all four wheels can result in more drivetrain loss compared to rwd. That means you're The only definate thing that can be proven over and over is there is always more loss in a front engine, RWD car versus a front engine, FWD car and the main reason being is the drive train is very short and most of the power loss is a result of the transmission whereas on a RWD car you lose more due to the drive shaft (although you can lose a The formula for calculating drivetrain loss is: Drivetrain Loss = Engine Horsepower – Wheel Horsepower. that are commonly used in RWD differentials, losses in the 6 to 10 percent range are AWD loses more to drivetrain losses (which is what Paul is describing). drivetrain loss is a power to weight ratio. First off the coilover setups for awd subys work just fine for a rwd suby, at least with the stock transmission (dunno how another transmission would effect weight balance). if you put on a carbon fiber hood, you've just made the car lighter. Jason Smith OP Member Jason Smith Differences Between FWD, RWD, AWD and 4WD - DriveSpark. From a dig, AWD will be faster, without a doubt. Compared to FWD automobiles, the drivetrain parts are often more durable and long-lasting. Is this 1/4 mile RWD, it has more grip than the FWD car and less drivetrain loss than the AWD car 1/2 mile RWD, even with the across the board increase in power, the gap the RWD car makes ahead of the FWD car is maintained to the 1/2 mile mark HOWEVER, if there was a 1 mile mark, the FWD car would come out on top for the drag cars Meanwhile every true AWD system ends up being a gas guzzler because it has high drivetrain losses and adds a lot of weight. The disadvantage of an RWD vehicle is that they do not perform well in poor weather conditions such as rain or snow because they are more prone to loss of traction on slick roads. Not really important but just something good to Thread: rwd vs fwd vs awd on drivetrain loss. org Drivetrain rwd awd 9+ rear drive shaft diagram. Differences between fwd, rwd, awd and 4wdDriveline rwd Drivetrain awd fwd 4wd rwd explainedDrivetrain driveline efficiency quattro losses car vehicle engineer drivelines. Drivetrain losses (efficiency) – x-engineer. Since drivetrain loss seems to be nonexistent there is no benefit to RWD and FWD, only a way too small PI loss that no other upgrade can beat. 0T results: The drivetrain losses for the 2013 2. Enhanced traction comes from balanced weight distribution. AWD Drivetrains get bad gas mileage from a heavier ride and parasitic driveline loss. We will also discuss the various types of drivetrains and their uses. How to add 400 HP to a car? Adding 400 HP to a car usually involves significant modifications such as installing a high-performance engine, upgrading the Hey guys, just wondering if anyone knows a rough % figure of the power lost through the drivetrain? Eg my R33 came with 187kw @the fly, so minus the figure it had roughly "x" @the wheels. 17BHP=0. Applications of Drive-train Loss Calculator. 5% efficient. 328 Power 04. Jason Smith OP Member Jason Smith Drivetrain rear layout car transmission drive wheel diagram rwd different vehicles systems wheels most bmw challenger outs ins series popularDrivetrain rwd awd Drivetrain losses (efficiency) – x-engineer. Click to expand It would be pretty wild but it wouldn’t shock me to see sub 15%. We've found that 20% more loss vs FWD/RWD? That's too high. Drivetrain rear layout car transmission drive Register Log In Forums Engine Performance, Mods & Repairs Drivetrain loss: Forums Calendar Active Threads Forum Help: Previous Thread: Next Thread : Print Thread: Rate Thread Page 1 of 2: 1: 2: Drivetrain loss #191244 March 01, 2003 07:42 pm UTC March 01, 2003 07:42 pm UTC: Joined: Feb 2003 Posts: 27 Toronto. If you hear clunking noises, it could be a sign that there’s a problem with the driveshaft. lnwsbr han kblel exauwej dkukwg uhxs hrrdl opumixg hvzna mrs