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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1331 (Rear Drive Axle) >> Repair Instructions >> Differential Replacement (8.6, 9.5/9.5 LD Inch Axles) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the differential ring gear. Refer to Drive Pinion and Ring Gear Replacement (8.6, 9.5/9.5 LD, and 11.5 Inch Axles)  or Drive Pinion and Ring Gear Replacement (10.5 Inch Axle) .
  2. Install the differential side bearings. Refer to Differential Side Bearings Replacement .
  3. Using the proper axle lubricant, lubricate the differential side bearings. Refer to Fluid and Lubricant Recommendations (USA and Canada) .
    4. Fig 1: View Of Differential Case And Axle Housing
    GM667660Courtesy of GENERAL MOTORS CORP.
    NOTE: Support the case in order to keep the case from falling out of the axle housing.
  4. Place the differential case, with the bearing cups installed, into the axle housing.
    5. Fig 2: Identifying Bearing Cap Bolt
    GM667502Courtesy of GENERAL MOTORS CORP.
    NOTE: DO NOT torque the bearing cap bolts at this time.
  5. Install the bearing caps and the bolts.
  6. Adjust the differential side bearing preload. Refer to Differential Carrier Bearing Preload Adjustment (8.6 Inch Axle)  or Differential Carrier Bearing Preload Adjustment (10.5/11.5 Inch Axles)  or Differential Carrier Bearing Preload Adjustment (9.5LD Inch Axle) .
  7. Adjust the backlash. Refer to Backlash Adjustment (8.6 Inch Axle)  or Backlash Adjustment (10.5/11.5 Inch Axle)  or Backlash Adjustment (9.5 LD Axle) .
  8. Perform a gear tooth contact pattern check. Refer to Gear Tooth Contact Pattern Inspection .
    9. CAUTION: Refer to Fastener Caution .
  9. Tighten the bearing cap bolts to 75 N.m (55 lb ft) for the 8.6 inch axle or 85 N.m (63 lb ft) for the 9.5/9.5LD inch axle.
  10. Install the axle shafts. Refer to Rear Axle Shaft Replacement .
  11. Fill the axle with the proper lubricant. 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) .
  12. Lower the vehicle.
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