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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 102 (Automatic Transmission - 8L45 (M5N) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Fluid Pump Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM5441317Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Fluid Filter (1) - Remove - Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement 

  2. GM5475519Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Fluid Baffle Bolt (1) - Remove and DISCARD [2x]

  3. Automatic Transmission Fluid Baffle (2) - Remove
  4. GM5460990Courtesy of GENERAL MOTORS COMPANY

    Manual Shift Detent Lever Spring Bolt (1) - Remove

  5. Manual Shift Detent Lever Spring (2) - Remove
  6. GM3816771Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission control wiring harness retainer (5).

  7. Disconnect the electrical connectors as needed then remove the transmission control wiring harness (4).
  8. Disconnect the automatic transmission auxiliary fluid accumulator solenoid electrical connector
  9. GM3816802Courtesy of GENERAL MOTORS COMPANY

    Pull back the manual valve spring (2), then disconnect the manual valve (1) from the manual shift shaft position switch assembly linkage (3).

  10. GM3817155Courtesy of GENERAL MOTORS COMPANY

    Rotate the engine as necessary to obtain access to the transmission fluid pump driven sprocket retainer (2).

  11. Using a suitable pry tool, unlock the transmission fluid pump driven sprocket retainer (2).
  12. Remove the transmission fluid pump driven sprocket (1).
  13. GM5461571Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not remove all the bolts in the control valve body assembly. Remove only the bolts indicated.

    Using the DT-48285  Valve Body Torx Plus Socket, remove the 4 M6 x 68 control valve solenoid body bolts (2).

  14. Using the DT-48285  Valve Body Torx Plus Socket, remove the 7 M6 x 45 control valve solenoid body bolts (1).
    15. CAUTION:

    Use care when handling the control valve body assembly. If dropped, damage to the control solenoid valve body assembly internal components may result.

  15. Control Valve Body (3) - Remove
  16. GM3681791Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    There are two different grade transmission fluid pump bolts. The bolt grade can be identified by looking at the top of the bolt head. Note the location and the grade of the automatic transmission fluid pump bolts for proper installation.

    Remove the 5 M6 x 28 automatic transmission fluid pump bolts (1).

  17. Automatic Transmission Fluid Pump (2) - Remove
  18. Automatic Transmission Fluid Pump Seal-Small (3) - Remove and DISCARD
  19. Automatic Transmission Fluid Pump Seal-Large (4) - Remove and DISCARD
  20. Automatic Transmission Fluid Pump Drive Shaft Bushing (5) - Remove
  21. Automatic Transmission Fluid Pump Passage Sleeve (6) - Remove
    22. NOTE:

    Only remove the locator pins if they need to be replaced.

  22. Automatic Transmission Fluid Pump Locating Pin (7) - Remove [2x]
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