Differential fluid

[mdcrabbie]

I have the OEM zexel torsen unit on my 2000 ss. Since this does not have clutch plates, do I need to add friction modifier when i change the fluid?

[km346]

Nope... 2 quarts of 75w90 and a new gasket or RTV is all ya need. The only time ive heard of people running the additive in a torsen is to cut down on gear whine.

[camarojunky74]

i use the motorcraft lsd additive, in mine, although it does not need it, my lsd works better than ever, no more random 1 tire fires on my 99