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Discussion Starter · #1 ·
Ladies & Gents - I've seen the question of adding or not adding friction modifiers to RP Max Gear rear dif oil posted on multi threads but I couldn't find a definitive answer so I went to the source with the question. Here is the response I received -

"We put the friction modifier needed for limited-slip differentials in the Max Gear formulations. You should not need to add any. After the fluid change, take the car to an open area and drive it through some slow, tight figure 8s. This will help work the new fluid into and between the clutches. "
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Royal Purple, Inc.

I thought it was good information and worth sharing.
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