Chevrolet Silverado / GMC Sierra. Manual — part 1494
Build up the clutch disc assemblies properly.
Proper clearance between parts is critical to the operation of the unit.
Adjust the backlash and thrust block clearance in the following order:
1. The left side gear backlash
2. The right side gear backlash
3. The thrust block clearance
Left Side Gear Backlash Adjustment
Fig. 292: View Of Left Side Gear Thrust Washer
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Courtesy of GENERAL MOTORS CORP.
1. Install the new left side thrust washer into the flange-end of the differential case.
Fig. 293: View Of Left Side Gear Cam Unit & Clutch Disc Assembly
Courtesy of GENERAL MOTORS CORP.
2. Install the left side locking differential side gear cam unit and clutch disc assembly into the
differential case.
3. Install the differential pinion gears with the deferential pinion gear thrust washers into the
differential case.
Align the openings of the differential pinion gears and the differential pinion gear thrust
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
washers to the pinion shaft opening in the differential case.
4. Install the pinion shaft. It may be necessary to press down on the side gear in order to align
the pinion gear shaft opening with the pinion shaft opening in the differential case.
If the pinion shaft cannot be installed after pressing on the side gear, replace the locking
differential clutch disc thrust washer with a thinner washer.
5. Install the pinion shaft lock bolt.
Tighten: Tighten the pinion shaft lock bolt finger tight.
6. Rotate the pinion gear closest to the lock bolt so that one of the teeth is pointing downward,
perpendicular to the ring gear flange.
7. Install a brass drift between the side gear and the pinion shaft.
Press the brass drift in far enough in order to compress the clutch discs.
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 294: Measuring Backlash Of Differential Pinion Gear & Side Gear
Courtesy of GENERAL MOTORS CORP.
8. Measure the backlash of the pinion gear and the side gear by doing the following:
1. Install the J 7872 (1) to the ring gear flange. See Special Tools.
2. Loosely clamp the J 8001-3 (2) onto the stem on the J 7872 (1). See Special Tools.
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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