Gear oil for 94 z28

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01-06-2014, 11:31 AM

dallasz2876

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Join Date: May 2013

Location: Dallas,GA.

Posts: 18

Gear oil for 94 z28

I am going to change the gear oil in my differential soon, I got the synthetic gear oil, do I still need the friction additive from gm?

01-27-2014, 03:10 PM

1994BmtZ28

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Join Date: Feb 2010

Location: E. Texas Gulf Coast...a.k.a. the 3rd Coast

Posts: 173

Re: Gear oil for 94 z28

Yes, ya gotta add the limited slip additive. I put Castrol Limited Slip 80W90 in mine...the additive was already blended in the gear oil. I'm sure Auto Zone, Oreilly, or whoever ya deal with will have it, and that it complies with GM specs.

01-27-2014, 03:55 PM

Injuneer

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Join Date: Nov 1998

Location: Hell was full so they sent me to NJ

Posts: 70,650

Re: Gear oil for 94 z28

Go to the Auburn website, and download the installation manual for their cone-type limited slip differential. Read the "IMPORTANT LUBRICANT NOTE" on page 2 of the manual.

Leading Manufacturer of Traction Enchancing Differentials & Planetary Drives - Auburn Gear