differental fluid

[mikesoc82]

im gettin my rear pinion & cover gasket seal replaced.

my question is what is the best differental fluid to go in there, i was considering mobil 1 synthetic differental fluid but im thinking since it mite be thinner than usual it mite start to leak out of the new seals..

[zlexiss]

Going with a 75w90 synthetic is no problem.

If the gasket leaks, it'll leak with any diffy fluid. Clean both surfaces well, and use a torque wrench on the bolts. Too tight can cause as many leaks as too loose by warping the cover.

I used Redline 75w90 gear oil (no additives needed) and the cheap Felpro gasket from Checkers. No RTV, no leaks with proper cleaning and torquing.

[Takumi Fujiwara]

Um, recomendd I think is 80w 90 and I have posi so I used additive.

[98Camaro3.8]

<blockquote>quote:</font><hr>Originally posted by Takumi Fujiwara:
Um, recomendd I think is 80w 90 and I have posi so I used additive.<hr></blockquote>

GM says to use Synthetic 75W-90. ;)

[ August 01, 2003: Message edited by: 98Camaro3.8 ]</p>

[chas]

i believe if you have the zexel-torsen posi you dont need the additive. it wont hurt, but you dont need it.

[Bliggida]

I reccomend painting your differential cover when you do the swap. I matched the exterior Pewter Metallic silver with an engine paint for protection against heat.

Easily worth 5 horsepower!

Click here to see proof!