what fluid in rear?

[covrace]

I'm servicing the 8.8 rear in my 1990gt. I'm replacing the cover, and changing the leaking gasket/silicone. my 8.8 is also a posi. what fluid do I run in this rear?

thanks
Jake

 

[Rick 91GT]

I like Redline 75w90 it has the friction modifer already in it.

 

[OL' WHITEY]

Valvoline 75W90 gear oil and Ford friction modifyer

 

[HISSIN50]

I like Redline 75w90 it has the friction modifer already in it.

X 2

 

[maverick0716]

I like Redline 75w90 it has the friction modifer already in it.

X 3

 

[Greenracing]

X4

 

[8950HO]

Mobil 1, 75W-90.No Ford friction modifier required.

 

[vristang]

Mobil 1, 75W-90.No Ford friction modifier required.

X2

Mobil 1 is far easier to find around here.

 

[89MustangGX]

X2

Mobil 1 is far easier to find around here.

x3

I'm currently using Amsoil but it's hard to find unless you order it.

 

[stang99x]

I ran plain old pennzoil synthetic GL5 and never had an issue. (unless you have a seriously leaded right foot)

 

[331 stang91]

Royal Purple

 

[Maryland Stang]

Motorcraft 80w90 with friction modifier.

 

[Cobra1894]

redline 75w90