Quote:
Originally Posted by Skylane765
I thought the rear end now use auto transmission fluid, so only the manual trans uses automatic trans fluid?
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No, manual calls for 75W-90 gear oil. The oil I used doesn't require any additional additive. And actually the manual calls for additive in the SS but not the ZL1. The GM LS gear oil 88862624 that is recommended for the ZL1 in the manual doesn't require additive.