GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

J 8614-01 Pinion Flange Holder

    Important: Observe and reference mark the positions of all the driveline components, relative to the propeller shaft and axles, prior to disassembly. Reassemble all the components in the exact relationship to each other as the parts were when these parts were removed. You must follow any specifications and torque values, and any measurements made prior to disassembly.

  1. Remove the front underbody shields, if equipped.
  2. Remove the left front underbody shield bracket.
  3. Remove the bolts and retainers from the pinion flange. Accurately mark the propeller shaft and pinion flange.
  4. Remove the front propeller shaft from the pinion flange. Refer to Propeller Shaft Replacement in Propeller Shaft.
  5. Remove the front propeller shaft. Mark the following components before disassembly in order to maintain the same preload torque upon assembly:
  6. • Pinion Flange
    • Pinion Shaft
    • Pinion Flange Nut

    Object Number: 9225  Size: SH
  7. Remove the pinion flange nut and washer. Hold the pinion flange using J 8614-01 .
  8. Remove the pinion flange. Have a suitable container in place in order to catch the lubricant.
  9. Remove the pinion oil seal by driving the seal out of the carrier with a blunt punch or drift. Do not damage the carrier.
  10. Inspect the seal surface of the pinion flange for the following conditions:
  11. • Tool Marks
    • Nicks
    • Damage such as a groove worn by the seal
  12. Inspect the carrier bore for burrs that might cause leaks around the outside of the seal.

Installation Procedure

Tools Required

    • J 8614-01 Pinion Flange Holder
    • J 33782 Pinion Oil Seal Installer
  1. Install the new pinion oil seal using the J 33782 .
  2. Apply special seal lubricant to the outside of the pinion flange and the sealing lip of the new pinion oil seal.
  3. Install the pinion flange in the exact spline relationship as when the flange was removed.

  4. Object Number: 9225  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the washer and nut using the J 8614-01 .
  6. Tighten
    Tighten the nut to the same position as marked during removal, then continue to tighten the nut 10 degrees after the marks.

  7. Connect the propeller shaft to the pinion flange.
  8. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  9. Install the propeller shaft flange to the front axle flange bolts. Align the marks made during removal. You must reassemble the components in the same position.
  10. Tighten
    Tighten the bolts to 19 N·m (14 lb ft).

  11. Check the axle lubricant level. Add lubricant as necessary. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
  12. Install the left front underbody shield bracket.
  13. Install the underbody shields, if equipped.