Before I go out to buy, how any quarts does the diff take?

 

From the 93 owners manual:
transmission 2.6 qts
Diff 1.4 qts

 

ok once again. use redline 75w90 and not
75w90ns for the differential. I want to make sure of this because it kinda seemed like there was a slight confusion.

redline 75w90 for differential.
redline mt90 for tranny.

 

Also make sure your oil is for a limited slip or you have to buy some sort of a abrasive addidive.

 

I've used NEO with good results. Seems to hang in there longer than the Redline. I change it about once a year/12,000 miles.

 

doesnt redline have this additive already in it?

 

Yes, it does. The 75w90ns does not.

Personally, I will be going with royal purple 75w90 when I drain my diff and trans fluids.