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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 901 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the new pinion oil seal using one of the following:
    • For vehicles with a 7.6 inch axle, 2-Door Utilities and 4WD Pickups w/ RPO M50 and w/o RPO ZR2, use the J 33782  .
    • For 2-Door Utilities and 4WD Pickups w/ RPO ZR2, use the J 22388  (1st design 8.6 inch axle) or the J 38694  (2nd design 8.6 inch axle).
    Fig 1: Installing New Pinion Oil Seal
    G01468144Courtesy of GENERAL MOTORS CORP.
  2. Apply sealant, GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the splines of the pinion flange/yoke.

    Important:  Install the pinion gear flange/yoke to the pinion gear shaft in the same position as marked during removal in order to maintain correct driveline balance.

  3. Install the pinion yoke.

    Align the marks made during removal.

    NOTE: Do not hammer the pinion flange/yoke onto the pinion shaft. Pinion components may be damaged if the pinion flange/yoke is hammered onto the pinion shaft.
  4. Seat the pinion flange/yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the flange/yoke.
  5. Install the washer and a new pinion nut.
  6. Install the J 8614-01  onto the pinion flange/yoke as shown.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

    Important:  If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.

  7. Tighten the pinion nut while holding the J 8614-01  .

    Tighten 

    Tighten the nut until the pinion end play is removed. Rotate the pinion while tightening the nut to seat the bearings.

    Fig 2: Installing Washer And A New Pinion Nut
    G01468145Courtesy of GENERAL MOTORS CORP.
  8. Measure the rotating torque of the pinion. Compare this measurement with the rotating torque recorded during removal.

    Tighten 

    Tighten the nut in small increments, as needed, until the rotating torque is 0.40-0.57 N.m (3-5 lb in) greater than the rotating torque recorded during removal.

    Fig 3: Measuring Rotating Torque Of Pinion
    G01468146Courtesy of GENERAL MOTORS CORP.
  9. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated. Check the rotating torque and adjust if necessary.
  10. Install the propeller shaft to the drive pinion flange/yoke. Refer to PROPELLER SHAFT REPLACEMENT - ONE PIECE or PROPELLER SHAFT REPLACEMENT - TWO PIECE in Propeller Shaft.
  11. Install the brake drums, if equipped. Refer to BRAKE DRUM in Drum Brakes.
  12. Install the brake rotors, if equipped. Refer to BRAKE ROTOR -- REAR in Disc Brakes.
  13. Install the brake calipers, if equipped. Refer to BRAKE CALIPER -- REAR in Disc Brakes.
  14. Install the tire and wheel assemblies. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
  15. Inspect and add axle lubricant to the axle housing, if necessary. Refer to LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE (7.6 AND 1ST DESIGN 8.6 INCH AXLE)  or LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE (2ND DESIGN 8.6 INCH AXLE)  .
  16. Lower the vehicle.
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