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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Rear Drive Axle >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement >> Installation Procedure

Installation Procedure

  1. Install the new pinion oil seal using the J 33782. 
    Fig 1: Installing New Pinion Oil Seal Using J 33782
    G01643115Courtesy 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 flange/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 yoke.
  5. Install the washer and a new pinion nut.
  6. Install the J 8614-01  onto the pinion flange/yoke as shown.
    Fig 2: Tightening Pinion Nut While Holding J 8614-01
    G01643116Courtesy of GENERAL MOTORS CORP.
    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.

  8. Measure the rotating torque of the pinion. Compare this measurement with the rotating torque recorded during removal.
    Fig 3: Measuring Rotating Torque Of Pinion
    G01643117Courtesy of GENERAL MOTORS CORP.

    Tighten 

    Tighten the nut is 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.

  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. Refer to PROPELLER SHAFT REPLACEMENT - REAR in Propeller Shaft.
  11. Install the brake calipers. Refer to BRAKE CALIPER (REAR) in Disc Brakes.
  12. Install the tire and wheel assemblies. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
  13. Inspect and add axle lubricant to the axle housing, if necessary. Refer to LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE .
  14. Lower the vehicle.
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