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?

5 Answers

251,405

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

6 of 6 people found this helpful.

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

4 of 4 people found this 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 of 6 people found this helpful.
235

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

Just talked with the dealer about my Silverado 2500 2014 LT. Front and Rear Differential receives 75-90 Synthetic The Transfer Case gets Dex VI.

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