Rear differential/rear end oil

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

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.

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.

What about this oil number 75-140 full synthetic is it work with gmc sierra 2500 hd or no

The liwui moly said for my truck 75-140 becuase here the weather is very very hot in summer

What type of gear oil to use on a 1994 chevy 3500 dually rear end?

If you are towing in a desert cliamate lots of heat. Watch banks power you tube videos on rear differentials-they have answers you are seeking.

Banks power videos explain heat build up during highway speeds and answer viscosity questions. Banks favors amsoil and includes it when you buy their diff cover.

Watch amsoil diff fluid change FOR 2008 chev duramax HD 2500.

Just passing along-dealer recpmmended lubricants are designed to get you just past the warranty period. Then YOU pay for repair worn put partsuse premium synthetics for longevity

Banks does NOT include Amsoil with diff. cover it is an addition charge if you want it. I went with Chevron Delo 75w90 Syn-Gear XDM.