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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1612 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Bearings Replacement (8.6, 9.5, 11.5 Inch Axles) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the outer pinion bearing cup using the J 8611-01,  8.6 inch axle, or the J 7818,  9.5 inch axle, or the J 8608  (11.5 inch axle) (2) and the J 8092  (1).
    Fig 1: Installing Outer Pinion Bearing Cup Using J 8611-01 Or J 7818, J 8608 & J 8092
    G01480721Courtesy of GENERAL MOTORS CORP.
  2. Install the inner pinion bearing cup using the J 45900,  8.6 inch axle, or the J 22306,  9.5 inch axle, or the J 44417,  11.5 inch axle (2) and the J 8092  (1).
  3. Determine the selective shim thickness for the pinion. Refer to Pinion Depth Adjustment (8.6 Inch, 9.5 Inch, 11.5 Inch Axles)  or Pinion Depth Adjustment (9.75 Inch Axle)  or Pinion Depth Adjustment (10.5 Inch Axle) .
    4. Fig 2: Installing Inner Pinion Bearing Cup Using J 45900 Or J 22306, J 44417 & J 8092
    G01480722Courtesy of GENERAL MOTORS CORP.
  4. Install the selective shim between the inner pinion bearing and the shoulder on the gear.
  5. Install the inner pinion bearing using the J 24433,  8.6 inch axle, or the J 36614,  9.5 inch axle, or the J 44412,  11.5 inch axle.

    Press the bearing on until the cone seats on the pinion shim.

  6. Install a new collapsible spacer.
  7. Lubricate the pinion bearings with axle lubricant. Use the proper fluid.
  8. Install the outer pinion bearing into the axle housing.
    9. Fig 3: Installing Inner Pinion Bearing
    G01480723Courtesy of GENERAL MOTORS CORP.
  9. Install a new pinion oil seal using the J 22388,  8.6 inch, 9.5 inch axles, or the J 44414,  11.5 inch axle.
  10. Install the pinion into the axle housing.
  11. Apply sealant, GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the splines of the pinion yoke.
    12. Fig 4: Install New Pinion Oil Seal Using J 22388 Or J 44414
    G01480724Courtesy of GENERAL MOTORS CORP.
  12. Install the pinion yoke.

    Align the marks made during removal.

  13. Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.
  14. Install the washer and a new pinion nut.
    15. Fig 5: Alignment Marks
    G01480725Courtesy of GENERAL MOTORS CORP.
  15. Install the J 8614-01  onto the pinion yoke as shown.
    NOTE: Refer to FASTENER NOTICE .
    IMPORTANT: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
  16. Tighten the pinion nut while holding the J 8614-01. 

    Tighten

    Tighten the pinion nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut to seat the bearings.

    Fig 6: Tighten Pinion Nut Using J 8614-01
    G01480726Courtesy of GENERAL MOTORS CORP.
  17. Measure the rotating torque of the pinion using an inch-pound torque wrench.

    Specification 

    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.

  18. 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.

    Tighten 

    Tighten the pinion nut, in small increments, as needed, 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.

  19. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.

    Recheck the rotating torque and adjust if necessary.

  20. Install the differential assembly. Refer to Differential Replacement (8.6 Inch, 9.5 Inch Axles)  or Differential Replacement (9.75 Inch Axle)  or Differential Replacement (10.5 Inch, 11.5 Inch Axle) .
  21. Fill the axle with lubricant. Use the proper fluid. Refer to Lubricant Replacement - Rear Drive Axle (8.6 Inch Axle)  or Lubricant Replacement - Rear Drive Axle (9.5, 10.5, and 11.5 Inch Axles)  or Lubricant Replacement - Rear Drive Axle (9.75 Inch Axle) .
  22. Lower the vehicle.
Fig 7: Measuring Pinion Rotating Torque
G01480727Courtesy of GENERAL MOTORS CORP.
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