Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [rear-differential]

51 questions
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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 diff is the part that also allows each wheel to…
Max Goodridge
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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 that the rear differential ratio is optimized for a…
ria
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Do I need to replace rear differential if it's leaking?

When we got an oil change, he said it's "leaking, but not out of fluid or low". Do we need to do any replacement/maintenance on it, or just wait until it gets worse? How would I check something like this?
Matt
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7
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Changing fluids (power steering and rear differential): when and why

A few months ago I've bought a 2009 Honda CR-V and took it to the official dealer for a check. They told me that some fluids (power steering, brake and rear differential) are "dis-color" and need to be changed ASAP (flushed). Now I have two…
dds
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How to adjust pinion bearing preload

I made a mistake using a sharpie to mark the nut when changing the radial seal of my rear differential’s input shaft. Oil and tools made the mark disappear. The common way to put this back together is to mark the bolt and torque until it is…
user3829017
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Car with broken left driveshaft won't stay in park

Today my rear left driveshaft gave up (lots of grinding noise while in Drive or Reverse, coming from the left side of the differential, and the car won't move). One strange thing I noticed is that the car will not stay still when it's in Park. I…
mariusmmg2
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What is making this noise coming from the rear end of my car?

2004 Mercury Grand Marquis It starts to make a noise the faster that I go the more high-pitched the noise gets when you slow down the noise gets more low-pitched. It's coming from the rear of the car it almost sounds like it is not shifting gears…
Gary Ballmann
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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 mechanics say the rear end needs to be rebuilt or…
Terry
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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 lock and unlock the diff on-demand. How do I do…
tempoc
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Disintegrated differential bearing: can it be blamed for pinion clanking over the ring gear?

I guess so, but would like to hear other opinions: this car transmission (Fiat 126p) comes with the gearbox and differential in the same unit. When driving it, and more precisely when turning a corner it lost transmission completely, with a…
Aram Alvarez
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1989 S10 Blazer Rear end differential

I have a 1989 S10 Blazer with an open differential. Due to the lack of traction on ice i want to replace the open differential with a limited slop differential. I was wondering if someone could tell me where I can find some information. I need to…
goodcat
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Difference between Limited-Slip Rear Axle

What's the difference between 3.15, 3.31, 3.55, 3.73 TORSEN limited-slip rear axles? Been trying to build a nifty 2016 Mustang GT Premium Fastback on Ford's website, and can't quite understand the difference in the available options for the…
0111010001110000
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Can i remove the rear diff in my land rover freelander?

recently the rear diff in my 1998 land rover freelander has gone (makes a horrible clicking sound around corners). The car has been a constant pain and i was wondering what is actually the cause of the noise (possibly worn teeth of diff?) and if it…
Alex
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How to tell if an 08 CTS has a limited-slip differential?

I'm looking at purchasing a 2008 CTS RWD. From what I could gather from various forums, it sounds like a limited-slip was only included if you purchased the "summer performance tires" package. I want to make sure that I get the LSD since I'll be…
Chriszuma
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Changing rear differential fluid - Is there need to top-off the fluid?

I have 22 Honda Pilot for which I recently changed rear differential oil. 1.92quart is the amount per manual - I poured 2quarts and no oil came out. Other online videos shows top-off process until oil started oozing out. I am wondering what is…
Vaquar
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