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Old 09-28-2020, 06:55 PM   #6
Russell James


 
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Drives: '15 SS 1LE, '69 Z28 drag car
Join Date: Dec 2009
Location: Mich
Posts: 4,483
The diff uses gear oil, the trans uses manual trans lube.

I've had the best luck with Royal Purple 75w90 max gear in the diff. It already has the limited slip additive in it. And Royal Purple Synchromax in the TR6060 trans. It will shift a little smoother than the OE fluid. Easy to get both from Amazon. 2 for the diff, 4 for the trans. Fill each until it runs out the fill hole.
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