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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1492 (Front Drive Axle - 4WD) >> Repair Instructions >> Differential Drive Pinion Flange/Yoke, Seal, and Dust Deflector Replacement - Front >> Installation Procedure

Installation Procedure

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  1. Install the new deflector onto the pinion yoke using a soft-faced hammer.
    Fig 1: Installing Deflector Onto Pinion Yoke
    G01597992Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Drive the seal in straight, not at an angle, as this will damage the aluminum housing.
  2. Install the new oil seal by doing the following:
    1. Position the oil seal in the bore.
    2. Install the J 33782  over the oil seal.
    3. Strike the J 33782  with a hammer until the seal flange seats on the axle housing surface.
  3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the splines of the drive pinion yoke.
  4. Install the pinion yoke.

    Align the reference marks made during removal.

    Fig 2: Installing New Oil Seal
    G01597993Courtesy of GENERAL MOTORS CORP.
    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.
  5. 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.
  6. Install the washer and a new pinion nut.
  7. Install the J 8614-01  onto the pinion yoke as shown.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 3: Installing Washer And Pinion Nut
    G01597994Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
  8. 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.

  9. Measure the rotating torque of the pinion using an inch-pound torque wrench.

    Compare the measurement of the rotating torque to the measurement recorded earlier.

    Specification 

    The rotating torque of the pinion nut should be 0.40-0.57 N.m (3-5 lb in) greater than the torque recorded during removal.

  10. If the rotating torque is not within specifications, 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 0.40-0.57 N.m (3-5 lb in) greater than the torque recorded during removal.

  11. 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.
  12. Install the rear steering gear crossmember. Refer to Steering Gear Crossmember Replacement - Rear   in Frame and Underbody.
  13. Install the front propeller shaft. Refer to PROPELLER SHAFT REPLACEMENT - FRONT  in Propeller Shaft.
  14. Install the engine protection shield. Refer to Engine Protection Shield Replacement   in Frame and Underbody.
  15. Inspect the axle lubricant level, and add, if necessary. Refer to LUBRICANT REPLACEMENT - FRONT DRIVE AXLE   . 
  16. Lower the vehicle.
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