Content .. 1378 1379 1380 1381 ..
Chevrolet Silverado / GMC Sierra. Manual - part 1380
Fig. 207: View Of Differential Carrier Housing, Gasket & Bolts
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The sealing surfaces of the differential carrier halves must
be free of grease and oil to ensure that the gasket will seal
properly.
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
24. Install the differential carrier case gasket (3).
25. Install the differential carrier case (2) half to the left differential carrier case half. If the
carrier case halves do not make complete contact, use the J 36599-A in order to back out
right differential adjuster nut sleeve until the differential carrier case halves make contact.
See Special Tools.
26. Install the differential carrier case bolts (1).
Tighten: Tighten the differential carrier case bolts to 73 N.m (54 lb ft).
27. Install the differential carrier assembly into a vise.
28. While rotating the pinion yoke back and forth, turn he right side differential adjuster nut
sleeve clockwise using the J 36599-A until 0. See Special Tools.0254-0.072 mm (0.001-
0.003 inch) of backlash can be felt between the ring gear and the drive pinion. If the
backlash specification cannot be obtained, turn the left side differential adjuster nut sleeve
counter clockwise using the J 36599-A one notch at a time until the backlash specification
can be obtained. See Special Tools.
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 208: Tightening Differential Adjuster Nut
Courtesy of GENERAL MOTORS CORP.
29. Using the J 36599-A turn the left side differential adjuster nut sleeve clockwise in order to
preload the differential side bearings against the differential side bearings cups. See Special
Tools.
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Tighten: Tighten the differential adjuster nut to 75 N.m (55 lb ft).
30. Rotate the pinion several times in order to seat the pinion and differential side bearings.
31. Measure the rotating torque of the drive pinion and differential assembly using an inch-
pound torque wrench.
Specification: The rotating torque of the pinion and differential assembly should be 0.57-
1.13 N.m (5-10 lb in) greater than the rotating torque of the drive pinion measured earlier.
32. If the rotating torque of the drive pinion and differential assembly is not 0.57-1.13 N.m (5-
10 lb in) greater than the rotating torque of the drive pinion, adjust the differential side
bearing preload using the following steps:
1. Place an alignment mark between the differential adjuster nut sleeve and the
differential carrier case, left and right sides.
2. Using the J 36599-A , turn the left and right side differential adjuster sleeves in or
clockwise one notch. See Special Tools.
3. Using an inch pound torque wrench, measure the rotating torque of the pinion and
differential assembly.
4. Compare the new measurement to the specification listed in Step 31. If the rotating
torque of the pinion and differential assembly is not within specifications, continue to
tighten the left and right side differential adjuster nut sleeves one notch on each side
until the rotating torque of the pinion and differential assembly is within specifications.
33. If the rotating torque of the drive pinion and differential assembly is more than 1.13 N.m
(10 lb in) above the rotating torque of the drive pinion measurement, adjust the differential
side bearing preload using the following steps:
1. Place an alignment mark between the differential adjuster nut sleeve and the
differential carrier case, left and right sides.
2. Using the J 36599-A or the J 36615 , turn the left and right side differential adjuster
nut sleeve out or clockwise one notch. See Special Tools.
3. Using a torque wrench, measure the rotating torque of the pinion and differential
assembly.
4. Compare the new measurement to the specification listed in Step 31. If the rotating
torque of the pinion and differential assembly is not within specifications, continue to
loosen the left and right side differential adjuster nut sleeve one notch at a time on each
side until the rotating torque of the pinion and differential assembly is within
specifications.
34. Once the specified rotating is obtained, rotate the pinion several times to ensure the bearings
have seated. Recheck the rotating torque and adjust if necessary.
2008 Chevrolet Silverado 1500
2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1378 1379 1380 1381 ..