Rear Diff Fluid

[redline727]

Do you guys recommend royal purple 75/90 or 75/140?

75/90 MaxGear. Don't use an other additives with it. RP already has friction modifiers in the MaxGear.

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[SmokedSS]

75/90 MaxGear. Don't use an other additives with it. RP already has friction modifiers in the MaxGear.

I just changed mine with RP synthetic @ 6,300 miles. After seeing what came out I wish I had done it sooner. The oil was black and nasty with trash on the magnet. Nothing hurt but I feel much better with the new RP in there now