Gear lube question
I am about to change my rear differential fluid on my Chevy 2500HD with the G80. I know people are using Mobile One and Royal Purple, but When I read up on them it says they contain friction modifiers...
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On the transfer case you should overfill it by 1 quart. The way to do that is by removing the switch on the top of the case towards the rear of the case and adding the additional oil there.
