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...
Forum Discussion
GeoBoy wrote:
I use Amsoil Severe Gear 75W-90 in my GM's and added their Slip Lock without any problems. If you read the spec's on Severe Gear, I don't believe you need any additives for the G80 differential. Don't forget the front differential if it is 4x4 and don't forget the transfer case.
I agree, AMZ/OIL Severe Gear is very highly rated. Here is a pic with 65K and towing 28-29K combined with my 11 HO RAM Dually, Fluid had at least 50K on it. The teeth om the ring gear had not even worn smooth yet. I run the 75/110 as recommended by AMZ/OIL.
