diff gasket

[961kyle]

Im wanting to change gear oil in the rear diff but not sure what gasket i need. I see there are a few different kinds, How can i figure out which one i need. I have a 1994 k1500 suburban

 

[Molson02536]

Im wanting to change gear oil in the rear diff but not sure what gasket i need. I see there are a few different kinds, How can i figure out which one i need. I have a 1994 k1500 suburban

I use the RTV Silicone hi temperature Gasket maker. Clean both sides of the surface with brake parts cleaner and put a endless bead or RTV Silicon on the differential cover and then place it on the differential. Move the cover around to ensure that it's evenly distributed and then tighten up the bolts. Don't over torque the bolts that you squeeze the RTV right out, with the excess RTV that squeezes out the side, run your finger around to ensure that there is a seamless bead around the cover and differential. I find this to be better then the bought Gasket and much easier to clean off when doing the job again after 3 years. Here is a link to what i use. Good luck and keep me posted. http://www.permatex.com/products/Au...mum_Temperature_RTV_Silicone_Gasket_Maker.htm

1994 GMC TRUCKS K1500 4WD PICKUP 5.7L 8-cyl Engine Code [K]

Differential, Front......GL-5 ALL TEMPS......80W-90
Limited Slip Differential, Rear......GL-5 ALL TEMPS......80W-90
Standard Differential, Rear......GL-5 ALL TEMPS......80W-90

CAPACITIES:

Differential, Front..........1.7 liters In cold climates when excessive shift effort is required to shift into 4WD GM part no. 12345836 or equivalent may be used in front differential.

Differential, With 10.5 RingGear Dana Rear..........2.6 liters
Differential, With 10.5 RingGear EX D Rear..........3.4 liters
Differential, With 12 RingGear Rockwe Rear..........6.6 liters
Differential, With 8.5, 8-5/8 R Rear..........2 liters
Differential, With 9.5 RingGear Rear..........2.6 liters
Differential, With 9.75 RingGear Rear..........2.6 liters

Note: 1988-99 models
Do not use synthetic lubricant in axles using RTV sealant.
Synthetic lubricant will chemically attack RTV sealant.
American Axle has only approved the use of Synthetic
Lubricant 75W-90 GM part no. 12378261, as follows:
a. All 8.6 inch rear axles are compatible.
b. All 9.5 inch rear axles built before mid-February 1998
(RTV sealant used to seal cover pan) are not compatible
c. All 9.5 inch rear axles built after mid-February 1998
(equipped with cover pan & gasket) are compatible.
d. All 10.5 inch rear axles built prior to March 3, 1999 are
compatible if axle shafthub RTV sealer is replaced with GM
gasket part no. 327739.

Good luck and keep up the good work.