Z06 rear diff fluid change
Thread Starter
Safety Car
Joined: Sep 2001
Posts: 4,267
Likes: 6
From: Cumming Ga
Z06 rear diff fluid change
Ok, I have been hearing a noise in my z06 which started at about 6000 miles and now about to turn 7000 is a bit louder.
My tires are balanced as far as I know, and this does not sound like a tire, since it is not really speed dependent. Also if you put the car in neutral it is stil there. I was thinking it might be a wheel bearing, but now am thinking about diff fluid. My 95 z28 was squeaking and making noise like crazy, and change the fluid, voila ok again!
I didn't check my owners manual, but what is the service interval on the rear oil? My z28 was I think change it after 5000 miles, and you only need to do this once.
Anyone had any problems with the diff oil>?
thanks
Tim
My tires are balanced as far as I know, and this does not sound like a tire, since it is not really speed dependent. Also if you put the car in neutral it is stil there. I was thinking it might be a wheel bearing, but now am thinking about diff fluid. My 95 z28 was squeaking and making noise like crazy, and change the fluid, voila ok again!
I didn't check my owners manual, but what is the service interval on the rear oil? My z28 was I think change it after 5000 miles, and you only need to do this once.
Anyone had any problems with the diff oil>?
thanks
Tim
Burning Brakes
Joined: Mar 2000
Posts: 973
Likes: 0
From: San Jose, CA
Re: Z06 rear diff fluid change (Timz06)
First, the rear differential comes stock standard with and specifies synthetic fluid, and 4 oz of the limited slip diff lube additive, gm p/n 1052358. Second, I just don't know if it comes with Mobil One.
The 2001 service manual indicates NO change is necessary for either the rear differential and the 6 speed transmission which calls for dexron lll (3) (non synthetic). I just recently changed (23k) 1. engine oil 2. synthetic ATF (6 speed transmission) and 3. synthetic 75w-90 (rear differential)with GM p/n1052358 4 oz., all Mobil One.
I can say two things: 1. I have a baseline and the synthetic ATF seems to have smooth out the shifting.
In your case however, I would get the mechanic to look at the problem that you mention before changing fluids, if you are so inclined.
The 2001 service manual indicates NO change is necessary for either the rear differential and the 6 speed transmission which calls for dexron lll (3) (non synthetic). I just recently changed (23k) 1. engine oil 2. synthetic ATF (6 speed transmission) and 3. synthetic 75w-90 (rear differential)with GM p/n1052358 4 oz., all Mobil One.
I can say two things: 1. I have a baseline and the synthetic ATF seems to have smooth out the shifting.
In your case however, I would get the mechanic to look at the problem that you mention before changing fluids, if you are so inclined.
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Re: Z06 rear diff fluid change (Timz06)
Yes, have a mechanic check out the problem.
Then when you are ready to change the fluid here are some pics:
http://www.picturetrail.com/gmblack3/647207
[Modified by gmblack3, 1:24 AM 3/8/2002]
Then when you are ready to change the fluid here are some pics:
http://www.picturetrail.com/gmblack3/647207
[Modified by gmblack3, 1:24 AM 3/8/2002]
Burning Brakes
Joined: Mar 2000
Posts: 973
Likes: 0
From: San Jose, CA
Re: Z06 rear diff fluid change (gmblack3)
Hey, I'd like to thank you for posting your experience in changing the tranmission and rear differential fluids. The service manual is clear enough, but reading your article as well as going over your pictures served as the push I needed to take the action!
The Mobil One synthetic ATF in the 6 speed transmission is subtlely smoother.
[Modified by ruking1, 10:18 AM 3/8/2002]
The Mobil One synthetic ATF in the 6 speed transmission is subtlely smoother.
[Modified by ruking1, 10:18 AM 3/8/2002]
