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Axles 75 or 80-90W. I used 80/90W. If you have the G80 option use the GM additive. Don't use aftermarket additive. The GM stuff is really best.
Transmission/t-case it's Dexron III maybe Dexron IV or whatever the GM newest fluid surpassing Dexron III
DO NOT USE GEAR OIL IN THE T-case. It's too thick.
DO NOT USE GEAR OIL IN THE T-case. It's too thick.
Don't use transmission oil?
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