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Questions tagged [drivetrain]

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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3 votes
1 answer
4k views

Thumping/vibration linked with wheel rotation

I have a 1999 Mercedes C class with a wheel vibration. Its a pulsing kind of like tapping your finger on a table or driving over grooved roads. Its linked to vehicle speed and is apparent from really ...
0 votes
1 answer
76 views

Automatic Car cannot drive forward, but will move in Reverse

Hey so my car was serviced last Wednesday, got an oil change and replaced the brake rotors and pads. And it was driving fine all of Thursday and then for whatever reason late Friday the car would ...
0 votes
1 answer
35 views

Making Jeep Gladiator Sport S (NOT Max Tow) Off-Road Ready

So I'm buying a new Jeep Sport S and want to make it off-road ready. I am going to be replacing the tires/wheels and adding a lift. My question is: Can a stock Sport S handle 33s... or even 35s? I ...
1 vote
2 answers
68 views

1993 Jeep Grand Cherokee wheel hops/bucks only after vehicle gets warmed up

I have a 1993 Jeep Grand Cherokee, with all-time 4 wheel drive (4 high/4 low). When the vehicle is cold, I can make tight turns in a parking lot with ease. However, if I've driven the vehicle for 10 ...
0 votes
0 answers
28 views

When put into drive, the car makes a click/crunch noise after a second

2006 Honda Accord with almost 230K miles. When put into drive, the car makes a click about a second after the gear is put into drive. What could this be? Car drives and shift with no problem.
0 votes
0 answers
22 views

02 ranger 3.0 4x4 auto trans 104,000 miles Possible drivetrain noise? Whining when coasting to a stop

Just did a lot of work to this truck, have had it 6 months now an motor is great and trans shifts as it should. Have done 2 oil changes on it every 3,000 miles 5w30 high mileage conventional, replaced ...
2 votes
1 answer
40 views

What is this bolt/set of holes?

This skid plate(?) is underneath the transfer case (I think - about halfway back from the transmission, between the transmission and the differential) my 1997 Chevy Suburban K1500 Due to my brake ...
1 vote
1 answer
45 views

Why do Automatic planetary transmissions have gear teeth cut on the outside of the ring gear?

it makes sense that there are teeth cut inside the ring gear since planet gears rotate around inside of the ring. However there are also gear teeth cut on the outside of the ring gear, i think they ...
2 votes
2 answers
793 views

Vibration following replacement of universal joints on drive shaft of rear wheel drive vehicle

I recently replaced the 2 universal joints on the drive shaft of my rear wheel drive Lancer station wagon (instead of the entire drive shaft). small welding tacks were done to keep them in place. ...
2 votes
1 answer
60 views

Theoretical AWD question

Don't know if this is a right place to ask this. So I know there's a difference between 4WD and AWD, and the difference being AWD has equal power distribution between front and rear axles right while ...
1 vote
2 answers
420 views

Vibrations when accelerating between 80 - 110 kph

2010 Fiat Ducato x250 2.3L Turbo Diesel When accelerating between 80-110 kph the vehicle shakes. The vehicle is completely fine below 80 kph and above 110 kph. The strength of the shaking is directly ...
1 vote
3 answers
96 views

Front-to-back vs left-to-right driveshaft

What is the reason, that all 4x4 and AWD vehicles use front-to-back driveshafts with lateral semi-axes, vs lateral driveshafts with front-to-back semi-axes? How would the later affect vehicle dynamics ...
0 votes
1 answer
832 views

Nissan Rogue 2010 AWD clicking noise when turning

Have a high-mileage 2010 Rogue AWD that makes a clicking noise from the rear when rounding corners. I suspect it was because it was improperly towed. My web searches have led me to believe that it's ...
1 vote
1 answer
669 views

2009 Subaru Legacy Poor acceleration with no DTC codes

2009 Subaru Legacy EJ253 Non Turbo 4EAT transmission The car seems to be in LimpHomeMode although I don't know how to verify that. Very poor acceleration with some hesitation when in drive. The ...
6 votes
2 answers
1k 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 ...
0 votes
1 answer
478 views

Rattling noise while accelerating in 2011 FORD FUSION AWD 3.0L

My 2011 awd fusion is make a rattling noise at the front drivers side of the car. The noise is only present while accelerating. There is no noise when the car is rolling without acceleration at ...
3 votes
1 answer
1k views

Powertrain vs Drivetrain vs Driveline

I did a bit of research and I'm really confused. Need a clear distinction between all three.
24 votes
16 answers
109k 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 ...
4 votes
2 answers
800 views

Vibration during Deceleration

I have a 2001 Mitsubishi Lancer CE, I recently replaced the clutch as the release bearing was no longer servicable. After replacing the clutch I noticed during deceleration a vibration like noise. At ...
1 vote
1 answer
562 views

How can a DCT be so fast and smooth during hard acceleration and high rpm shifting?

I know how a DCT works and what parts it has, but I've always wondered how it manages to shift very fast and still be smooth, while having little torque drop during shifts.In a manual transmission, ...
7 votes
5 answers
40k 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 ...
5 votes
1 answer
3k 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 ...
6 votes
2 answers
813 views

PTFE or standard high temp grease for a slip joint?

My 1997 Ford F-150, 4.6L with automatic, is suffering from the slip join "clunk" at stops/starts. My research has found this is a common problem when the output shaft splines get dried out. It ...
1 vote
1 answer
152 views

is a seriously corroded driveshaft and u joints on an F150 safe? dealer who sold me car says no

I think a corroded drive train this corroded is a safety issue, bought used f150 from dealer get out on highway and was scared to hell whole truck shook so bad -drove truck back later same day saying ...
3 votes
1 answer
5k 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 ...
2 votes
2 answers
51 views

Is RWD a good idea on a 2.5 tonne car? [closed]

Hypothetically speaking, if you were to produce a 2.5 tonne car what drive train configuration would suit it best? My initial thought would be a 4x4 set up as this is most common in heavier vehicles. ...
8 votes
1 answer
14k views

Grinding noise while driving

On my Opel/Holden Astra H (150KKm, front wheel drive, m32 6-speed manual transmission) I hear a slight grinding noise from the right-front, starting at about 40 km/h. The noise is synchronous to the ...
0 votes
3 answers
895 views

Mismatched brand tires on back, bad on high speeds?

Wouldn't post a new question if the internet wasn't full of "Yep, perfectly fine" one one side and "Nope, you're going to hit the closest tree" on the other side. Driving a FWD Volvo S40 2.4i. ...
7 votes
6 answers
76k 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) is ...
0 votes
1 answer
23 views

Odd squeak from axle/bearing area at any speed

My FWD 2001 Ford Focus has an odd rubbery squeak sound combined with a more thumpy sound from inside the vehicle at any speed. There is no sound when accelerating, and a slight sound (much less) when ...
4 votes
1 answer
330 views

Vibration after the car has run for a while

First question here; go easy on me. So I have an e30 BMW(1989), the car runs fine however when I have driven for a few minutes a vibration occurs when I travel around 60(kph) This does not happen ...
2 votes
0 answers
536 views

Cracking noise when launching vehicle or at lower gear

I have a Nissan X-Trail 2002 manual with almost 300k on it. I know it's old, but it was the only secondhand manual SUV I could find. The last service was about than 3 months ago. I drove it into a ...
0 votes
0 answers
16 views

Thumping and scraping sounds

I recently bought a 1995 Toyota Corolla that has been in a wreck. When accelerating, there's almost always a thumping sound that increases with tire speed. It gets louder if I turn left and goes away ...
7 votes
2 answers
17k 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 ...
7 votes
8 answers
49k 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 ...
2 votes
2 answers
2k views

What is a through-drive axle? and what is an interaxle differential?

While reading the 'Mercedes Truck Front Axle Systems' (https://www.mercedes-benz.com/en/mercedes-benz/vehicles/aggregates/powertrain-trucks-front-axle-systems/) I was confused as to what a 'through-...
3 votes
0 answers
1k views

clunking noise over bumps from rear right 1997 ford ranger 3.0 liter 5 speed manual transmission

I've noticed a clunking sound coming from rear right side of my truck when going over bumps. It's a 1997 Ford Ranger 3.0 liter manual 5 speed, has over 150,000 miles. Haven't found loose suspension, ...
13 votes
5 answers
48k 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 ...
17 votes
2 answers
7k 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 ...
3 votes
2 answers
2k views

2003 Ford Ranger Drivetrain Noise while Coasting

Me: 2003 Ford Ranger XLT, Automatic Transmission, 4.0L V6, 4x4, 180k miles. I do my own vehicle maintenance (brakes / suspension / ...), but am not a mechanic by any stretch. The Issue When ...
3 votes
0 answers
2k views

What could cause a clicking/popping noise when driving straight? (video)

Car is automatic front wheel drive Toyota. The sound comes on light-medium acceleration from speeds 15-35mph even when driving straight and it sounds just like a bad CV joint. In the video I have ...
-1 votes
1 answer
2k views

Tire and drive shaft revolutions near equal?

Obviously if you have a front wheel drive it is the same. When a rear wheel drive car makes 1 tire revolution while driving how many revolutions does your drive shaft make? Are driveshafts mistaken ...
6 votes
1 answer
781 views

Using 4wd on snow/dry pavement bad for 2012 Pathfinder?

Just bought a 2012 Nissan Pathfinder LE. I live in Colorado where the weather can be pretty random and very location specific. This creates areas of the town where snow may be covered in some areas ...
0 votes
3 answers
85 views

Why does my 1997 Suburban sometimes not get up and go?

I've got at 1997 Chevy Suburban. Recently we had the fuel pump changed, because we hit a bump and it gave up the ghost. In the last month there have been at least three times when we we've stopped, ...
9 votes
6 answers
30k 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 ...
1 vote
0 answers
600 views

Possible causes of rotational axle play and rattling

Car is a 2007 Saturn Aura AT A while ago I ran into a large rock with my passenger front wheel, insurance paid for the apparent damage but about a week later I started feeling rattling from that ...
6 votes
2 answers
2k 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 ...
1 vote
1 answer
13k views

Can driving in drive 2 damage my car

Not going to over inform here, suffice it to say that my 1997 Jeep Wrangler engine begins to choke and cut off at stops. Many ideas and repairs tried. I recently found that driving in (Automatic) ...
1 vote
1 answer
148 views

Metallic thud sound

Recently after having my car sit for 3 months I noticed a metallic thud sound wich can be heard in any of the two following scenarios: -When braking only when im reverse (it only happens once for ...
4 votes
1 answer
2k views

Different tread depths on 2wd?

I am sorry if this question has been asked before I tried searching. My 05 civic which is a fwd has one tire on the back with very low tread unlike the other tires mounted on the car, is this going to ...