rear end noises?
This is a discussion on rear end noises? within the Drivetrain forums, part of the LSx Technical Help Section category; I have a 94 Z28 A4. And recently it has started to make some weird nosies when turning. It does ...
12-11-2008, 07:00 AM #1
- Join Date
- Nov 2008
- Northern Utah
- 94 Z28 A4 T Tops 52K MINT
rear end noises?
I have a 94 Z28 A4. And recently it has started to make some weird nosies when turning. It does it worse in reverse turning left. I flushed out the rear end about a month ago and used Amsoil 75w90 syn severe gear oil/w slip lock additive. It's odd that it just started to make noise a month after the fluid change.
This car I bought from orignal owner and has not been driven hard at all. It only 52K on it as well as being bone stock. Could it be that I am driving it alot more now? Any help would be great. Thanks.
12-11-2008, 01:22 PM #2
you put in the GM slip additive right? I heard that's the only stuff that does the job. Also, check your torque arm bushings, and drive shaft U joints. Is the rear leaking and if so how much?
12-12-2008, 06:17 PM #3
Newer SAE J306
Under these new limits, it is permissible to use 75W-110 gear lube in the place of 75W-90 gear lube in order to attain the correct gear lube viscosity of at least 19.5 cSt @ 100C.
Thatís probably not what you wanted to hear after spending hard earned coin on the 75W-90 lube, but the 110 lube will give you the oil viscosity GM originally required for your differential.
Hope this helps,
12-20-2008, 03:55 AM #4
75W-110 in place of 75W-90...
Below, an original personal message from My94ZZZ to CompSyn regarding differential noises.
Originally Posted by My94ZZZ
12-20-2008, 01:11 PM #5
hey comp you got the write up on that info???
12-20-2008, 04:27 PM #6
2005 SAE J306 write ups...
Initially I didnít provide the links like a normally would because the best source I found where you donít have to pay for the info, is through a company that makes oil additives. And of course you know that Amsoil does not recommend the use of oil additives with their motor oils. So it was a conflict of interest of sorts. But since you asked nicely, Iíll take you right to the sourcesÖ
Helpful write up on SAE J306
SAE J306 Abstract
12-20-2008, 08:22 PM #7
thanks man i was just curious...i am already a amsoil freek but thought i would read up. thanks again
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