The group of components in a motor vehicle that generate power and deliver it to the road surface. These components can include the engine, transmission or transaxle, transfer case (if so equipped), drive line, and axles.

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27
votes
3answers
10k views

Difference between FWD/RWD/4WD/Part-Time 4WD/AWD?

I'm curious as to what are the particular difference between the various drive systems available in modern vehicles. FWD and RWD are pretty straightforward - Front Wheel Drive cars put the power to ...
13
votes
4answers
950 views

Is there a benefit to belt driven motorcycles?

What are the pros and cons of belt driven motorcycles compared to chain driven bikes?
13
votes
1answer
4k views

how to optimize fuel consumption by changing the rear differential ratio?

Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph). Is it true ...
11
votes
4answers
17k views

How to diagnose high speed vibration?

I get a vibration at high speeds (50+), can feel it particularly in the steering wheel, front seats, dashboard. I have been trying to figure out what's going on, keeping in mind that: All 4 shocks ...
10
votes
6answers
18k views

What is the purpose of plastic engine covers?

I have a 2010 Toyota Corolla. What is the purpose of the large plastic cover that stretches over my valve cover? Does it have a particular function? Are they just for looks? Or are they designed by ...
8
votes
1answer
46 views

Does 2WD mode save me gas over AWD(auto) mode?

My 2015 Nissan Pathfinder has a switch for 2WD, AWD (auto), and 4WD Lock. Do I save gas by keeping it in 2WD? Or it doesn't matter because it's still the same drivetrain and it simply doesn't apply ...
7
votes
6answers
3k views

Does wheelspinning damage my car?

Apart from the tires, if I pull off quickly and I wheel spin, do I cause any damage to the internals of the car? Obviously I don't mean reving it to 4k+ and then dumping the clutch, I mean speeding ...
7
votes
4answers
2k views

Car pulls to right when letting go of accelerator?

I'm driving an old Grand Voyager minivan temporarily, and notice that when I accelerate then let go of the accelerator, the car pulls slightly to the right, and I have to correct it by steering a ...
7
votes
1answer
366 views

How to shorten a driveshaft?

How can I shorten a driveshaft? Are there any warnings before proceeding? What tools are required, and optimal? Is there a "required" way to measure correctly? How can I keep the metal square? Is ...
7
votes
5answers
6k views

Can I improve fuel economy by changing differential’s gear ratio?

I would like to use my Lada Niva for normal road travel, but at 3500 rpm at 100 kph it is not very fuel efficient. I don’t know what the current differential ratio is, but I assume it has been changed ...
7
votes
2answers
67 views

What additional wear will occur on the drivetrain from running larger tires and not regearing?

This is probably best viewed as a general question, however specifically I'm talking about a 2004 Jeep Wrangler Unlimited with an automatic transmission. I have gone from stock 29 inch tires up to 33 ...
7
votes
1answer
315 views

Why do open differentials drive the wheels on the ground when a vehicle drives on two?

In this youtube video, a Toyota FJ cruiser in Saudi Arabia drives up on two wheels while 5 people get out and remove the wheels on that side. https://www.youtube.com/watch?v=MQm5BnhTBEQ This turns ...
6
votes
5answers
16k views

How to extend the life of the dual mass flywheel in a diesel engine?

I am looking for ways to improve the life of the dual mass flywheel (DMF) in my 2005 Ford Focus tdci. I have heard that they can wear out quite quickly on the Ford Focus if they are driven in city ...
6
votes
2answers
350 views

Identify that part of my S56 BMW M Coupe

There is a driveline component with a rubber shock absorption ring in it. It sits between the tranny and driveshaft. I cannot remember the name of this component. Does someone know the name of ...
6
votes
1answer
39 views

What exactly is an outer CV joint and how can I replace one?

I recently got my 2004 VW Passat B5 a new MOT, but they said that an advisory item that would get worse over time were worn outer CV joints. The car creeks when turning on full left lock, though I ...
6
votes
1answer
75 views

Drivetrain sounds like rustling leaves above 4k RPMs

2011 Mazda6 FWD 2.5L I4 6-speed manual 85,000 miles 5-6k miles ago (2-3 months) I started to notice a "rustling" sound coming from the front of my drivetrain, but only when in gear above 4,000 RPMs. ...
6
votes
1answer
101 views

Fixing vibrations caused by replacing springs?

I am slowly restoring a 2000 Jeep Cherokee Sport with 97K miles to use as a winter/light towing vehicle. I had some sag in my coil springs and leaf springs and the shocks were shot. So I had my ...
6
votes
2answers
1k views

2000 Chevrolet Silverado - Clicking Noise From Front Differential

I have recently noticed a clicking noise from the front differential on my 2000 Chevrolet Silverado when traveling at low speeds (under 10 MPH, but I'm sure it's always there, but it's too fast/too ...
6
votes
1answer
83 views

Wrangler JK transfer box options

Apologies for a very Jeep-centered question, that may not interest everybody. Here goes: I own a 2009 Wrangler JKU (pre face-lift), equipped with the 2.8 TD engine, Chrysler NSG370 six-speed manual ...
5
votes
2answers
157 views

Why is it that the front of the car lifts up when releasing the clutch?

I don't know much about the inner workings of a car. For driving one, I find that having an rough idea about what the gearbox, engine and clutch do and where they are is often enough. However for the ...
5
votes
4answers
12k views

1 Piece versus 2 Piece Drive Shaft

A guy on a Nissan forum asked why he should keep his 2 piece drive shaft in his truck instead of changing over to a 1 piece version. This was the answer I gave him: The 2 piece drive shaft (DS) ...
5
votes
2answers
8k views

RWD vs FWD advantages and disadvantages

I want to know the advantages and disadvantages of rear wheel drive and front wheel drive cars I know that cars with FWD can't drift. Are there any other advantages or disadvantages?
4
votes
2answers
4k views

does a car normally continue moving at a constant speed when in gear and the foot is taken off the accelerator pedal?

I remember when driving a passenger car, when I took my foot off the accelerator pedal completely, but remained in gear, the car would normally continue to move at some low speed, different for each ...
4
votes
1answer
61 views

Does it save wear on AWD drivetrain to shift to Neutral before going into Park or Reverse?

I have an old Subaru with All Wheel Drive. I can feel in some circumstances the larger and more complex drivetrain "winding and unwinding" all those differentials and CV joints. It feels unpleasant, ...
4
votes
2answers
299 views

Can I use a CNC machine or waterjet to make an adapter plate to adapt a 5 speed transmission to a rare, obsolete engine?

I am the sad, proud owner of a Nissan SD33T (Diesel), mated to a 4 speed T-19. The power this engine outputs (101HP, 160#/TQ stock) means it struggles on the highway, and I don't want to sacrifice my ...
4
votes
1answer
148 views

2002 Subaru Legacy, Grinding Sound

Just got home from work and put my car into park and heard a grinding sound. The parking brake stopped working. I tried putting it into drive and got the same grinding sound. It was as if something ...
3
votes
4answers
3k views

FWD vs RWD winter time [closed]

Background: All my life I drove FWD (Front Wheel Drive) cars. I drove FWD in different conditions with all-season tires and always got good and even predictable handling during winter periods. In ...
3
votes
1answer
96 views

Speed difference between rear wheel and front wheel drive

Hypothetically if we have two almost identical cars with identical attributes (horse power, engine size, weight, etc.) , but one of them is front wheel drive and the other is rear wheel drive. My ...
3
votes
1answer
38 views

Driving simulation while on front jackstands

I have a 2007 Tacoma, 4WD. I wanted to perform a driving simulation but with the truck being still in order to troubleshoot a rattling sound I can't reproduce when the engine is idling but the ...
3
votes
2answers
23 views

Throw out bearing, input shaft bearing, or drive shaft support bearing?

I have a '94 BMW 318is manual transmission. I hear a grinding/whirring noise while driving that sounds to me like a bad bearing. I typically hear it when I engage the clutch. The sounds is more ...
3
votes
1answer
56 views

Buying a 1981 Kawasaki 440 D questions

There is a 1981 Kawasaki 440 D that is belt driven on Craigslist for $850 and I just have a few questions on about it being a belt drive. Is a belt drive ok to have? Is it worse than chain drive? And ...
3
votes
2answers
7k views

02 Trailblazer with front end vibration which seems to increase over time

About a month ago my trailblazer developed this new features. When you get into the car and start driving, everything feels completely fine. Then after about 5 minutes you start noticing slight ...
3
votes
1answer
38 views

2003 Dodge Durango - Can I take the front drive shaft off and drive the vehicle?

I most likely have a messed up front differential on my 4x4. I was wondering if I can just take my drive shaft off and run it on RWD only? Can I just remove the universal joint pin and retain the ...
3
votes
1answer
2k views

2004 Mazda 3 - clank when shifting into reverse

Every morning, or after the car has sat for a while, there is a loud clank from the engine area when I shift it into reverse. Sometimes I hear the same clank when shifting into drive, but not always. ...
2
votes
1answer
417 views

Rubbing noise when driving with clutch engaged?

I am a complete newbie when it comes to jeeps (and cars in general). However, I am very good at fixing things... once I know what the problem is. After a summer of riding with the top down I was used ...
2
votes
2answers
190 views

1996 Chevrolet Caprice - drive train is making noise

When I speed up in my 1996 caprice I hear pinging sounds that sound like little rocks hitting my drive shaft. would that be u joints? it only does it at lower speeds.
2
votes
1answer
231 views

New engine and clutch, have weird vibration @3K RPM

I just replaced (well, had someone else replace) the engine in my 06 Solstice. The engine runs great for the most part (will open a separate question about that), but there is a weird vibration at ...
1
vote
1answer
88 views

Downshifting to a stop- wear and tear?

I drive a Mustang GT, and I love the deceleration "pop" that you get when the engine revs climb without the accelerator being pressed, so as one might surmise, I tend to downshift to a stop at lights ...
1
vote
2answers
523 views

Custom drive shaft manufacturers in the UK

As there is no Kit car section in the Stack yet, I thought I should ask this one here. I am building an engine conversion project, which requires custom drive shafts. I have the CV joints for both ...
1
vote
1answer
938 views

ABS break sensor melted in mazda 3

I have a 2007 Mazda 3 (2.0L). Recently, I took apart the front axle in order to replace the half-shaft on the driver's side. At the same time, I have replaced my brake caliper because I realized ...
1
vote
1answer
770 views

Replacing a LSD, what needs to be considered between 1, 1.5, 2 way?

I need to replace the LSD on a 1995 (NA series) MX-5. The original diff was a viscous LSD, and over time has deteriorated as I hear they do. It is now essentially an open diff, if I lift one wheel off ...
1
vote
1answer
1k views

How do I change the CV Joints on my 2003 Acura TL?

How do I change the CV Joints on my 2003 Acura TL? My 2003 Acura TL 3.2 has been making creaking sounds when I turn around corners and I've been told that old, noisy CV joints are likely the culprit. ...
0
votes
2answers
182 views

Would it be worth it to rebuild my Detroit Locker?

I'm considering either buying a Wavetrac LSD (very expensive, so that's discouraging) or rebuilding my current Detroit Locker. The Locker seems to run fine except there's a lot of play in it. Would ...
0
votes
1answer
53 views

I have a car drive-train question. [closed]

I have a car drive train question. I'm looking at used SUVs since my last car died 3 months ago (20 yr old Honda Accord), specifically looking at vehicles like the Honda CR-V or Toyota RAV4.I know AWD ...
0
votes
1answer
343 views

Material and construction properties of drive shafts, wheel shafts, gearbox

I am looking for some typical properties of a 1.4L rear-drive car's drive shaft, drive-wheel shafts and the gearbox. I need to calculate the moment of inertia of the components of the drive-train. So ...
0
votes
3answers
44 views

My Chrysler 300

someone put sugar in my tank I had it dropped and clean but when they put it back together when you drive at 35-40 mph, it vibrates underneath the car what do you think it is?