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Questions tagged [differential]

A planetary gear train which sits between the engine and driven wheels to allow them (driven wheels) to spin at different relative speeds with each other to account for varying paths taken (varying surface, turning etc.)

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3
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0answers
63 views

aluminium particulates in manual transmission oil

I've removed the center differential part(s) from a 2001 subaru legacy to find that one of the internal parts lost its alignment/position (began to move axially) and began wearing away small areas of ...
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1answer
33 views

Mercedes Benz W203 C-Class C220 CDI whining noise

I have my W203 (Automatic Transmission 722.6) that is killing me with this whining noise when i let the release the gas pedal and the sound change intensity depending on the speed. It starts when ...
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1answer
52 views

05 WRX drive train issue,grinding noise coming from center to back of car + rear wheel hop developping during tight slow turns

I have a 05 WRX which has been producing grinding noise from somewhere between the center to the back of the car. The noise starts to happen once the car is warmed up and under power. It can also keep ...
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0answers
48 views

Gear oil boiling and burning in front differential

When I engage 4WD on my (normally rear-wheel drive) Toyota Hilux (KUN26R) and give it some hard job to do (like drive the front wheels on a 10cm high sleeper lying on the ground, or just turn the ...
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1answer
41 views

How to tell if a 4WD vehicle features LSD and/or ADD?

I am about to change oil in the front and rear differentials or my Toyota Hilux (KUN26R) which is a part-time 4WD vehicle. Regarding what gear oil to use and how much, the manual says: Oil type: ...
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2answers
331 views

Safe to drive a car that have back diff leak?

I have Range Rover Sport 2013. The back diff have been leaking for a month maby 1-2 drops each morning when I go to my parking lot in the morning. I have Service 17th April for the mechanics to take ...
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1answer
65 views

Mechanic says rear differential is shot

Mechanic is saying rear differential is shot and needs replacing. Car hasn't been making any noises, actually only took it in to look at a leak in coolant reservoir. Wouldn't there be lots of ...
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0answers
44 views

How can one manufacturer's 4-wheel drive system be so much better? [closed]

It's often discussed that subaru for example has a very high performing all-wheel drive system. The Nissan GTR is another that comes to mind. While I've never heard others be specifically criticized, ...
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1answer
71 views

How to adjust differential's carrier bearings without any special tool

This differential unit comes with threaded adjusters for both carrier bearing. The car manual talks about using dial and torque gauges to adjust the bearings preload, but I don't have any of those ...
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0answers
269 views

BMW e83/2008 X3 rear wheels skidding at low speed turns

After replacing worn gear in transfer case actuator servo motor, I noticed that rear wheels appear to be skidding on dry surface when I try to brake or accelerate at low speeds with steering wheel ...
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2answers
404 views

What causes rear axle shaft breakages in heavily loaded trucks on uphill shifts?

Where I come from the ISUZU FSR 33H is the preferred truck for transporting heavy construction materials. The truck is capable of hauling loads in the order of 6 to 7 tonnes. However I cannot help but ...
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1answer
3k views

Can a bad rear differential hurt an automatic transmission?

I have a bad rear differential (one of the driveshaft seals is shot, and almost all the oil is gone), and I was wondering if this can affect my automatic ZF-6HP26 transmission.
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2answers
425 views

Differential whine - caused by tyre differences?

I've recently purchased a 2014 VW Golf. There is a whine that occurs which is directly proportional in noise to the car's speed - so it appears related to the final drive. From what I can determine, ...
2
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1answer
67 views

A tale of two diffs: which one needs more TLC?

Background My 2009 V8 LR3 has done around 150k km. It has a permanent 4WD system. I have no record of prior drivetrain-related maintenance. Question If I have to prioritize which diff's fluid to ...
4
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1answer
1k views

Component identification - Mini Cooper S R53 (2005) Limited Slip Differential

I own a 2002 Mini Cooper (R50), a Model Year infamous for its failure-prone 5-speed manual gearbox. When failure occurred I replaced the whole starter motor - flywheel - clutch - gearbox - axles ...
1
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1answer
83 views

FWD open diff car with one failed CV joint. Would this get me home?

A couple of days ago I was driving a 5-speed Manual RHD 2002 Mercedes W168 A-Class CDI 170 Elegance and the offside front CV joint broke. This left me stranded a few miles from home and I have to ...
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3answers
597 views

1998 Grand Cherokee 4WD wheel hop

My 1998 Grand Cherokee has an automatic 4WD system - no locking hubs or controls to select for 4WD - not clear to me what system it is or how it is implemented. In snow, for example, if the rear ...
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1answer
3k views

Can wrong size tire on both sides damage the differential

I mounted some tires to use as a burners to do some sliding so I don't burn my dailyes the car is a 93 Miata which is a RWD. The tires I mounted on the back are both from a civic but the tire size is ...
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2answers
12k views

Front Right Wheel locked up while driving

I have a 2006 Mitsubishi Lancer. I was driving on the freeway when all of a sudden I start hearing a loud squeaking noise. Then, when I came to a low speed (15 km/h or so), there was a massive BANG ...
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1answer
194 views

What is this part called? (Rear wheel lock ?)

I need help finding how to open this part, but first I have to know what is it called. This part is supposed to be a Lock that connects the Drive shaft to the differential on a KIA Sportage. I have ...
5
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1answer
4k views

Subaru clunking and whining - differential?

I have a 2002 Subaru Outback with a 5 speed manual and 160k miles on it. The previous owner claims to have replaced the front differential, because it was locked up. Now, I have been hearing whining ...
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0answers
52 views

Cracks on both front and back differential - Normal?

AUDI A4 2012 2TFSI QUATTRO - I took my car into a service centre for a check and was told both differentials have got have cracks. Car is still on motor plan, took it into Audi to be replaced and was ...
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1answer
3k 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 ...
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0answers
1k views

Fj cruiser rear diff lock

I bought a 2009 FJ cruiser and I can see the rear differential lock motor on the rear differential but I don't have any switch inside to activate it ? Is there any way to add a switch to be able to ...
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2answers
3k views

How exactly does a differential work?

I understand that the differential (or "diff") is the thing that allows the drive shaft to transfer its rotational velocity to the front or rear axle in order to move the car. As far as I know, the ...
4
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1answer
110 views

jeep compass 2012 with 4wd locker on, only one rear wheel spins

With my Jeep Compass 2012 when 4wd locker is on (I see it ON on the panel as I pulled locker), So I noticed that when I was parking at full of now parking lot, my front wheels stopped spinning, and ...
6
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1answer
828 views

Lexus RCF - Torque Vectoring Differential, How Does it Work?

I was reading about the Lexus RCF and how it has a torque vectoring differential and how this differential has the ability to put more torque on the outer turning wheels rather than on the inside ...
2
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1answer
238 views

I have a 2000 Suzuki Grand Vitara 5 Speed Ticking noise

I hear a ticking noise coming from the driver side rear end, possibly coming from the differential, not sure though because i checked out the pinion gear and i don't see any chips off any of the teeth,...
5
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1answer
201 views

Is there such a thing as a “drive tire”?

I once went to get my tires replaced on my '03 Honda Accord after not having rotated them in a while. One of the front tires seemed to be more worn than the other front tire. An employee at the tire ...
5
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7answers
17k views

Rear end Differential - rebuild or replace with used?

I have a 01 Ford F 150 with 320K miles. I love this truck and don't plan on ever selling it. I thought the bearings were going out in the back right side so I took it to mechanic. Two different ...
3
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1answer
325 views

Cars 101: How is torque conveyed from transmission to differential?

This is a very basic question. I understand that the torque is passed from the engine onto the transmission via the flywheel in manual transmission or flexplate in case of automatic. The transmission ...
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0answers
54 views

How does FWD moves rear wheels without skidding [duplicate]

In a RWD vehicle the rear wheels have a differential and the front have ackermann steering or so, that prevent both the front and rear wheels from slipping, but in a FWD the differential is part of ...
2
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1answer
326 views

1999 Ford Expedition 4x4 5.4 front cracking noise

I've had this problem for several months now. I started hearing this cracking noise when I turned left of right. Only when I've driven the truck a while. I've replaced the boots from both sides and ...
6
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2answers
10k 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 ...
5
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1answer
3k views

How to hack an on-demand rear diff locker on FJ Cruiser bypassing the ECU?

The Electronic Control Unit on my FJ Cruiser is not relaying the signal properly to the rear differential lock actuator when I switch it on. I want to bypass the ECU altogether and make the switch ...
7
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1answer
908 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 ...
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2answers
2k views

Is there an advantage using 2 smaller motors on Tesla car's rear axle?

Let me be clear: I am speaking about the rear wheel drive model. After I've asked https://mechanics.stackexchange.com/questions/15342/number-of-motors-rwd-tesla , it seems Tesla's rear axle has only ...
2
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1answer
2k views

Non LSD oil in a LSD

I recently changed all the oils in my land cruiser BJ40, including the rear differential which has a limited slip dif with apparently something called a power trax traction system. I put in normal ...
3
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2answers
1k views

2007 Nissan Frontier Transmission, Differential & Transfer Case service intervals for light driving?

According to the owner's manual service/maintenance guide, automatic transmission fluid, differential oil & transfer case oil should be inspected for leaks at the following intervals: ...
2
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2answers
211 views

Differential Gear Alternative Ratio

I have Mercedes-Benz E-200 Estate Model 1995 with a Differential Ratio Number 3.92; Which I couldn't found; So I'm looking for a Differential Gear EQUIVALENT to 3.92 Ratio? For example can I use 3.90 ...
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6answers
27k views

Damage to Audi differential with new front tires and old rear tires

I just bought two new front tires for my Audi A8 with Quattro all-wheel drive and was told I should replace the back tires as well. I can't afford those tires for a week or so. How long can I drive ...
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2answers
462 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 ...
5
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1answer
9k views

Automatic Transmission or Differential Backlash (Play)

I noticed that my car has what it seems to be significant differential play. I have a 1993 Acura Integra with automatic transmission. What I mean by play is simple: say I jack up only one front wheel ...
7
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5answers
13k 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 ...
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2answers
1k views

Drivers side back tire not spinning

I have a 1990 Toyota pickup, and I noticed when I got stuck in some sand that only the passenger side back tire spins, while the driver's side does not. Any ideas why?
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5answers
19k views

Why don't FWD cars have rear differentials?

This confuses me. The point of a differential is to make it so the wheels don't slip when one needs to be turning faster than the other, such as during turns. So if the rear wheels are directly ...