What to use in Rear differential?

[Benji]

I am hoping to finally get a good answer here.

I am wanting (needing) to replace my rear diff fluid. Can someone advise me on what works best on our cars? Also, where can I get that product?

Thanks for the help!

 

[Defiant]

Voy-luh:

http://www.roadraceengineering.com/eclfluids.htm

 

[90GSX]

I run, and recomend RL Shock-Proof. It's listed on RRE's site, linked above, or also available from your local speedshop.

Good luck,