GM Rear diff fluid
03-02-2016, 08:11 PM
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GM Rear diff fluid Hey guys I'm going to change my rear diff fluid I was wondering what fluid I need and where I can get GM fluid. I have a z28 98 Camaro. Also what additive do I need
03-02-2016, 10:40 PM
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1998 was the last year for Auburn posi as the base/stock rear, and this unit calls for conventional (non-synthetic) 80w90 lube with a bottle (4oz) of the GM limited slip additive (can be purchased directly from GM); the additive is required for this rear. '99+ received a Torsen limited slip that calls for 75w90 synthetic and the additive is optional (though GM technically still recommends it in the service manual.)
