GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 CTS 🢒 Engine 🢒 Engine Electrical 🢒 Drive Flange and Seal Replacement

Tools Required

    • J 6125-1B Slide Hammer
    • J 23129 Universal Seal Remover
    • J 29873 Injector Nozzle Socket 30 mm
    • J 44765 Seal Installer
    • J 45012 Holding Fixture
    • J 45019 Universal Puller

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

    2. Object Number: 785877 Size: SH
  2. Remove the transmission manual shift shaft nut.
  3. Disconnect the shift linkage from the transmission.
  4. Place the transmission in NEUTRAL by rotating the transmission shift shaft clockwise 2 clicks.
  5. Remove the exhaust system. Refer to Exhaust System Replacement .

    6. Object Number: 801931 Size: SH
  6. Disconnect the propeller shaft coupler (1) from the transmission flange. Refer to Propeller Shaft Replacement .
  7. Push the front propeller shaft toward the rear of the vehicle in order to release the propeller shaft coupler (1) from the transmission drive flange.

    8. Object Number: 787650 Size: SH
  8. Secure the front propeller shaft (1) to the shift control lever (3) with a piece of mechanic's wire (2).

    9. Object Number: 804354 Size: SH
  9. Install J 45012 to the drive flange.
  10. While holding J 45012 . Remove the drive flange nut using J 29873 .
  11. Remove J 45012 from the drive flange.

    12. Object Number: 822505 Size: SH
  12. Remove the drive flange thrust washer (4).
  13. Remove the drive flange (2) using J 45019 .
  14. Remove the drive flange O-ring seal (3) from the drive flange.
  15. Remove the output shaft assembly retainer (1).

    16. Object Number: 794669 Size: SH
  16. Use J 6125-1B and J 23129 to remove the transmission case extension seal (1).

Installation Procedure

    Object Number: 794670 Size: SH

    Important: Install the seal onto the tool before installing into the case to prevent damage to the seal.

  1. Using J 44765 install the new transmission case extension seal (1).

    2. Object Number: 822505 Size: SH
  2. Install a NEW output shaft assembly retainer (1). Position the retainer on end of the output shaft splines. The retainer will be pushed to the proper depth as the drive flange is installed onto the output shaft.
  3. Install a NEW drive flange O-ring seal (3) into the drive flange.
  4. Install the drive flange (2) to the transmission output shaft.
  5. Install a NEW drive flange thrust washer (4).
  6. Apply Loctite 272 (GM P/N 89021297) to the NEW drive flange nut threads.

    7. Object Number: 804354 Size: SH
  7. Install the J 45012 to the drive flange.

    8. Notice: Refer to Fastener Notice in the Preface section.

  8. While holding J 45012 Install a NEW drive flange nut using J 29873 .

    9. Tighten
    Tighten the drive flange nut to 60 N·m (44 lb ft).

  9. Remove J 45012 from the drive flange.

    10. Object Number: 787650 Size: SH
  10. Remove the mechanic's wire (2) securing front propeller shaft (1) to the shift control lever (3).

    11. Object Number: 801931 Size: SH
  11. Install the propeller shaft coupler (1) to the transmission flange. Refer to Propeller Shaft Replacement .
  12. Install the exhaust system. Refer to Exhaust System Replacement .

    13. Object Number: 785877 Size: SH
  13. Place the transmission in the PARK position by rotating the shift shaft fully counterclockwise.
  14. Connect the shift linkage to the transmission.
  15. Install the transmission manual shift shaft nut.

    16. Tighten
    Tighten the transmission manual shift shaft nut to 9 N·m (80 lb in).

  16. Check the transmission fluid level. Refer to Transmission Fluid Check .
  17. Lower the vehicle.