legacyak Posted December 16, 2007 Share Posted December 16, 2007 I'm going to be changing the differential fluids in my OO OBW 5sp tranny. What is the best performing differential oil? Quote Link to comment Share on other sites More sharing options...
fnlyfnd Posted December 16, 2007 Share Posted December 16, 2007 Rear Diff oil - use mobil 1 GEAR oil/ Tranny fluid - use redline 75w-90NS or Valvoline Synpower Quote Link to comment Share on other sites More sharing options...
Setright Posted December 16, 2007 Share Posted December 16, 2007 Valvoline "Synpower" is highest on my list. Followed only by Motul "Motylgear". In the long run, nothing else comes close to offering fast crunch-free shifts. Synpower has recently cured the 2nd and 3rd gear crunch in our newly purchased XT Turbo - 1988 Model Year! Quote Link to comment Share on other sites More sharing options...
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