|
|
Content .. 1474 1475 1476 1477 ..
21. Tighten differential bearing adjuster nut lock bolts. Tighten: Tighten the differential bearing adjuster nut lock bolts to 27 N.m (20 lb ft). 22. Measure the ring gear to pinion backlash and adjust, if necessary. Refer to Backlash Adjustment (8.6 Inch Axle) or Backlash Adjustment (10.5, 11.5 Inch Axles) or DIFFERENTIAL CARRIER BEARING PRELOAD ADJUSTMENT (8.6 INCH AXLE) Wedge Method Tools Required J 22779 Side Bearing Backlash Gage. See Special Tools. J 25588 Side Bearing Shim Installer. See Special Tools. Adjustment 1. Install the drive pinion, if necessary. Refer to Drive Pinion and Ring Gear Replacement (8.6, 9.5/9.5LD, and 11.5 Inch Axles) or Drive Pinion and Ring Gear Replacement 2. Measure the rotating torque of the drive pinion using an inch-pound torque wrench. Record the measurement. Specification: The rotating torque of the drive pinion should be 1.7-3.4 N.m (15-30 lb in) IMPORTANT: The differential side bearing preload adjustment must be In order to maintain the original backlash, adjust the Measure the service shims and the spacers one at a time. Do not use or reuse the original cast iron production shims.
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3. If the rotating torque for the drive pinion bearings is not within specifications, adjust as necessary. Refer to Drive Pinion and Ring Gear Replacement (8.6, 9.5/9.5LD, and 11.5 4. Install the differential assembly with the differential side bearings and differential side bearing cups into the axle housing. 5. Insert one 4.318 mm (0.170 in) thick service spacer into the left side of the axle housing. 6. Side the differential assembly towards the service spacer in order to hold the spacer in place. 7. Install the J 22779 into the right side of the axle housing. See Special Tools. The J 22779 must be installed between the service spacer and the differential side bearing 8. Tighten the knob on the J 22779 until there is moderate drag when the J 22779 is moved. See Special Tools. 9. Remove the J 22779 . See Special Tools. 10. Remove the service spacer. 11. Using a micrometer, measure the thickness of the service spacer. Record the measurement. 12. Using a micrometer, measure the thickness of the J 22779 in 3 locations. See Special Tools. Calculate the average of the 3 measurements. Record the measurement. 13. Add the thickness of the service spacer, measured in step 11 to the average thickness of the J 22779 , measured in step 12. See Special Tools. The resulting value is the total service shim 14. Insert one BENT 1.016 mm (0.040 in) service shim between the right side differential side bearing cup and the axle housing. The service shim must be installed between the service 15. Install the J 22779 into the left side of the axle housing. See Special Tools. The J 22779 IMPORTANT: Before installation of the differential assembly, ensure that the differential side bearing surfaces in the axle housing are IMPORTANT: Over-tightening of the J 22779 may spread the housing and result in incorrect shim selection. See Special Tools.
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
must be installed between the service spacer and the differential side bearing cup. See 16. While rotating the ring gear back and forth, tighten the knob on the J 22779 until there is approximately 0. See Special Tools.025-0.051 mm (0.001-0.002 in) of backlash between 17. Once the correct amount of backlash is obtained, remove the J 22779 . See Special Tools. 18. Remove the differential assembly with the differential side bearings and the differential side bearing cups. 19. Remove the BENT service shim. 20. Using a micrometer, measure the thickness of the J 22779 in 3 locations. See Special Tools. Calculate the average of the 3 measurements. This value is the left side service shim 21. In order to determine the right side service shim thickness, subtract the service shim thickness for the left side of the axle, calculated in step 20, from the total service shim 22. In order to preload of the differential side bearings and set the backlash to approximately 0.127-0.223 mm (0.005-0.009 in), take the value determined in step 21 and add 0.203 mm 23. Assemble the left side shim pack using one 4.318 mm (0.170 in) service spacer and the appropriate amount of service shims equaling the thickness determined in step 20. Measure 24. Assemble the right side shim pack using one 4.318 mm (0.170 in) service spacer and the appropriate amount of service shims equaling the thickness determined in step 22. Measure 25. Install the differential assembly with the differential side bearings and the differential side bearing cups. 26. Install the left side service spacer and service shim into the axle housing. The service shim must be installed between the service spacer and the differential side bearing cup. 27. Install the right side service spacer between the axle housing and the differential side bearing cup. 28. Install the right side service shim into the axle housing using the J 25588 , if necessary. See Special Tools. The service shim must be installed between the service spacer and the
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
29. Install the differential bearing caps and the bolts. Tighten: Tighten the differential bearing cap bolts to 75 N.m (55 lb ft). 30. Rotate the pinion several times to ensure the drive pinion and differential side bearings have seated. 31. Measure the rotating torque of the drive pinion and differential side bearings using an inch- pound torque wrench. Record the measurement. Specification: 0.57-1.13 N.m (5-10 lb in) greater than the rotating torque of the drive 32. Calculate the differential side bearing preload by subtracting the drive pinion preload, measured in step 2, from the drive pinion and differential case bearing preload, measured in Specification: The differential side bearing preload should be 1.7-4.0 N.m (15-35 lb in). 33. If the differential side bearing preload is not within specifications, add or subtract shim thickness equally from each shim pack as necessary in order to increase/decrease the side 34. Once the differential side bearing preload is correct, measure the backlash and adjust, if necessary. Refer to Backlash Adjustment (8.6 Inch Axle) or Backlash Adjustment 35. Once the differential side bearing preload and backlash is correct, perform a gear tooth contact pattern check in order to ensure proper alignment between the ring and pinion gears. Shim Method Tools Required J 25588 Side Bearing Shim Installer. See Special Tools. Adjsutment NOTE: Refer to Fastener Notice . IMPORTANT: The differential side bearings must have preload before the
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1474 1475 1476 1477 ..
|
|
|