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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3answers
2k 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 ...
6
votes
4answers
4k 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 ...
5
votes
1answer
1k 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 ...
5
votes
1answer
150 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 ...
3
votes
3answers
3k 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 ...
3
votes
0answers
88 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 ...
2
votes
1answer
90 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 ...
2
votes
2answers
211 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
votes
2answers
96 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 ...
1
vote
2answers
282 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?
1
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0answers
84 views

Would there be 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 ...
0
votes
2answers
87 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 ...