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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1585 (Rear Drive Axle) >> Repair Instructions >> Differential Drive Pinion Gear Bearing Replacement (8.6, 9.5, 11.5 Inch Axle) >> Assemble Procedure

Assemble Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Installing Outer Pinion Bearing Cup
    GM889101Courtesy of GENERAL MOTORS CORP.
  1. Using the J 8611-01:  installer, 8.6 inch axle, or the J 7818:  installer, 9.5/9.5LD inch axle (1), and the J 8092  (2), install the outer pinion bearing cup.
    2. Fig 2: Installing Inner Pinion Bearing Cup
    GM651743Courtesy of GENERAL MOTORS CORP.
  2. Using the J 45870  , 8.6 inch axle, or the J 22306  , 9. See Special Tools .5/9.5LD inch axle (2), and the J 8092  (1), install the inner pinion bearing cup.
  3. Determine the selective shim thickness for the drive pinion. Refer to Pinion Depth Adjustment (8.6, 9.5/9.5 LD and 11.5 Inch Axles)  or Pinion Depth Adjustment (10.5 Inch Axle) .
    4. Fig 3: View Of Selective Pinion Spacer & Pinion Gear
    GM2139036Courtesy of GENERAL MOTORS CORP.
  4. Install the selective shim (1) on the shoulder on the differential pinion gear (2).
    5. Fig 4: Installing Inner Pinion Bearing Onto Pinion Gear
    GM651742Courtesy of GENERAL MOTORS CORP.
    NOTE: Press the bearing on until the cone seats on the pinion shim.
  5. Using the J 22828:  installer or the J 36614:  installer, install the inner pinion bearing.
    6. Fig 5: Removing Collapsible Spacer
    GM739955Courtesy of GENERAL MOTORS CORP.
  6. Install a new collapsible spacer.
  7. Lubricate the pinion bearings with axle lubricant. Use the proper fluid. Refer to Fluid and Lubricant Recommendations (USA and Canada) .
  8. Install the outer pinion bearing into the axle housing.
  9. Install the differential pinion gear into the axle housing.
    10. NOTE: DO NOT re-use the old pinion nut, replace with NEW only.
  10. Install the NEW differential pinion oil seal, flange/yoke, and the NEW nut and washer. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement .
    11. Fig 6: Measuring Pinion Rotating Torque
    GM661077Courtesy of GENERAL MOTORS CORP.
  11. Using an inch-pound torque wrench, measure the rotating torque of the pinion should be between 1.0-2.3 N.m (10-20 lb in) for used bearings, or 1.7-3.4 N.m (15-30 lb in) for new bearings.
  12. If the rotating torque measurement is below 1.0 N.m (10 lb in) for used bearings, or 1.7 N.m (15 lb in) for new bearings, continue to tighten the pinion nut in small increments, until the torque required in order to rotate the pinion is between 1.0-2.3 N.m (10-20 lb in) for used bearings, or 1.7-3.4 N.m (15-30 lb in) for new bearings.
  13. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.
  14. Recheck the rotating torque of the pinion bearing and adjust if necessary.
  15. Install the differential assembly. Refer to Differential Replacement (8.6, 9.5/9.5 LD Inch Axles)  or Differential Replacement (10.5 Inch, 11.5 Inch Axle) .
  16. Fill the axle with lubricant. Use the proper fluid. Refer to Differential Oil Replacement (10.5 Inch Axle)  or Differential Oil Replacement (11.5 Inch Axle)  or Differential Oil Replacement (8.6 Inch Axle)  or Differential Oil Replacement (9.5LD Inch Axle) .
  17. Remove the support and lower the vehicle.
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