Rear differential/rear end oil

10

Asked by May 16, 2012 at 03:34 PM about the 2003 Chevrolet Silverado 2500HD 4 Dr STD 4WD Crew Cab SB HD

Question type: Maintenance & Repair

What is the proper oil for rear end?  Do you need to add an additive?

4 Answers

210,105

You can use any SAE 75W-90 Synthetic Axle Lubricant that meets GM Specification 9986115 which is basically API GL-5, Mobil-1 75W-90 is fine. No additives

5 out of 5 people think this is helpful.

just about any gear oil will work good 75w-90 it doesnt have to be synthetic.

4 out of 4 people think this is helpful.
165

My front diff didn't like regular gear oil (chatter when backing up). I switched to Lucas 75W-90 synthetic and it was nice and smooth.

6 out of 6 people think this is helpful.
175

i use lucas or at truck stops they have oil call power punch that has always worked good for me

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