Removal & Installation
A new pinion shaft lockbolt should be installed whenever either of the axle shafts is removed.
The axle shaft and seal may be removed and replaced without disturbing the bearing or seal but it is highly recommended to replace the seals when removing the axle shaft.
- Before servicing the vehicle, refer to the Precautions Section.
- Remove rear wheels.
Remove brake drums.
- Using a wire brush, clean the dirt/rust from around the rear axle cover.
- Drain the fluid.
- Remove rear pinion shaft lockbolt and the pinion shaft.
- Remove C-lock from the button end of the axle shaft by pushing the axle shaft inward.
Remove axle shaft from the axle housing.
NOTEBe careful not to damage the oil seal.
WARNINGIf equipped with an Anti-Lock Brake System (ABS), be careful not to damage the reflector ring on the axle shaft or the speed sensor bolted to the backing plate, immediately adjacent to the shaft.
Remove oil seal by prying the it from the end of the rear axle housing.
WARNINGDO NOT damage the housing oil seal surface.
Remove wheel bearing using the GM Slide Hammer tool J-2619, the GM Adapter tool J-2619-4 and the GM Axle Bearing Puller tool J-22813-01.
- Clean and inspect the components for excessive wear or damage and replace them, if necessary.
Install new or reused bearing, coated with gear lubricant, using the Axle Shaft Bearing Installer tool J-34974 to drive the bearing in until it bottoms against the seat.
WARNINGBe sure the bearing installer does not contact and damage the speed sensor on ABS equipped vehicles.
Install new seal lubricated with gear oil using the GM Axle Shaft Seal Installer tool J-33782 to seat it in the housing until it is flush with the axle tube.
NOTEBe sure the seal installer does not contact and damage the speed sensor on ABS equipped vehicles.
- Install axle shaft into the housing by engaging the splines.
Install C-lock retainer on the axle shaft button end.
WARNINGBE CAREFUL not to damage the wheel bearing seal.
- Install axle shaft by pulling it outward to seat the C-lock retainer in the counterbore of the side gears.
- Install pinion shaft through the case and the pinions. Tighten the new lockbolt to 27 ft. lbs. (36 Nm).
- Install new rear axle cover gasket.
- Install housing cover.
- Install brake drums.
- Install wheels.
- Refill the housing.