Diff Fluid?

[Juggernaut]

No friction modifier needed for torsen diffs.
Friction modifier is usually for clutch pack diffs

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[NightmareMoon]

For those of you who track, Redline GL-5 75w140 (no extra friction modifier) works. The no friction modifier bit is per Redline’s tech people.

 

[webspoke]

For those of you who track, Redline GL-5 75w140 (no extra friction modifier) works. The no friction modifier bit is per Redline’s tech people.

I think they meant this one:
Red Line Synthetic Oil. 75W140 NS GL-5 Gear Oil (redlineoil.com)

I will try it as the 75w90 still gets pretty warm even with the cooler when I slide the back end more.

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