Differential Oil change

[Robertaz]

What is the rear differential lube capacity? I've searched the GMC handbook and couldn't find it. I've read most of the data posted on this site pertaining to the Rear Differential and found it very informative. Now that I know what to do, I need to know how much gear lube to buy.

[wangotango]

The rear drive axle (from the service manual for 11.5") says 3.62 liters / 3.83 quarts.

Specs are: axle lube (GM part #12378261) SAE 75w-90 Synthetic or equivalent meeting GM spec 9986115

You may also want to ref "rear end lube " post from 06/01.

w/t

[ 06-01-2002: Message edited by: wangotango ]</p>

[Robertaz]

Thanks.