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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion Flange/Yoke and/or Oil Seal Replacement (9.5 Inch Axle) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM651744

    Using the J-38694  installer, install the NEW pinion seal

  2. Apply sealant to the splines of the pinion yoke. Adhesives, Fluids, Lubricants, and Sealers
  3. GM788905
    CAUTION:

    Refer to Pinion Flange/Yoke Installation Caution .

    Align the reference marks and install the pinion yoke.

    4. NOTE:

    Proceed to step 5 if the new pinion nut cannot be installed.

  4. Install the washer and the NEW pinion nut.
  5. Perform the following steps in order to seat the pinion yoke onto the pinion.
    1. Remove the pinion nut washer.
    2. Install the old pinion nut.
    3. Tighten the nut until a few of the shaft threads show through the nut so that the washer and new pinion nut can be installed.
    4. Remove the old pinon nut.
    5. Install the pinion nut washer
    6. Install the new pinion nut.
  6. GM661080
    CAUTION:

    Refer to Fastener Caution .

    NOTE:

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

    Using the J-8614 - 01  holding tool, tighten the pinion nut until the pinion end play is just taken up.

  7. Rotate the pinion while tightening the nut to seat the bearings.
  8. GM661077
    NOTE:

    Tighten the pinion nut in small increments until the proper torque is reached.

    Using an inch pound torque wrench, measure and the rotating torque of the pinion. The rotating torque is 0.40 - 0.57 N.m (3 - 5 lb in) is greater than the rotating torque recorded during removal and compare that to the measurement taken during the removal.

    9. NOTE:
    • Recheck the rotating torque and adjust if necessary.
    • Take care not to split the nut lip which could affect nut torque retention. If nut lip is split, use new nut.
  9. 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.
  10. GM4886706
    NOTE:

    Nut MUST be staked for 9.5. inch axles.

    Use a hammer and punch to stake two sides of the drive pinion nut lip to the corresponding grooves (1) in the drive pinion gear.

  11. GM361391

    Align the reference marks and install the propeller shaft (3) to the pinion yoke (4).

  12. Install the propeller shaft. Propeller Shaft Replacement (With M5U) , or Propeller Shaft Replacement (With MYD)
  13. Install the rear brake calipers. Rear Brake Caliper Replacement (JH6) , or Rear Brake Caliper Replacement (JH9)
  14. Install the tire and wheel assemblies. Tire and Wheel Removal and Installation (Without Dual Rear Wheels) , or Tire and Wheel Removal and Installation (With Dual Rear Wheels)
  15. Inspect and add axle lubricant to the axle housing, if necessary. Rear Axle Lubricant Level Inspection (10.5 Inch Axle) , or Rear Axle Lubricant Level Inspection (9.5 Inch Axle) 
  16. Remove the support and lower the vehicle.
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