I used amsoil 75w-90 in the tranny about 4 qts.

Valvoline syn 80w-90 in the Diff. 2 qts.

Why are alot of ppl using 75w-90 in the Diff. when the service manual states to use 80w-90 ?? Its not like its hard to find found them at pepboys, auto advance, I'm just curious why...

 

I used Amsoil Series 2000 75W 90 in both applications. It meets the API service codes for both.
Why not put the good stuff in the diff, too??

 

Yea thats true, I just wanted to get within specs as much as I could thats why i went with 80w-90 amsoil is 75w-90... maybe next time I'll just use amsoil in both. Where did you buy yours at??

 

I set myself up as a preferred customer- it was worth the small investment. I order direct from the web site.
I contacted their techs about both applications and the API service codes and they confirmed that the Series 2000 was an excellent choice for both. Plus, no mixing, as with Redline and no additional additives necessary for the LSD.

 

Can you give me that website? I think I'm going to order it.

Thanks for your help.

 

http://intershop.amsoil.com/cgi-bin/Amsoil.storefront/

You can add a preferred customer membership to your first order and receive the discount immediately.