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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement (M5U with LF4 Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Fuel Pipe Shield
    GM4019981Courtesy of GENERAL MOTORS COMPANY
  1. Disconnect the transmission vent hose retainers (2) from the fuel pipe shield (3) during removal of the shield. Fuel Pipe Shield Replacement (LF4)
    2. Fig 2: Radiator Outlet Pipe Retaining Bolt
    GM4016182Courtesy of GENERAL MOTORS COMPANY
  2. Remove the radiator outlet pipe retaining bolt (1) from the right rear cylinder head.
  3. Disconnect and reposition the inlet hose from the thermostat housing. Heater Inlet Hose Replacement (LF4) .
  4. Disconnect and reposition the outlet hose from the thermostat housing. Heater Outlet Hose Replacement (LF4) .
  5. Raise and suitably support the vehicle. Lifting and Jacking the Vehicle (Base)Lifting and Jacking the Vehicle (V-Series) .
  6. Disconnect the electrical wiring harness retainers from the upper transmission to engine stud bolts and from the transmission.
  7. Two-Piece Propeller Shaft Replacement (LTG, LGX, LCV)Two-Piece Propeller Shaft Replacement (LF4) »Remove
  8. Transmission Heat Shield Replacement »Remove
    9. Fig 3: Transmission Range Selector Lever Cable
    GM4032383Courtesy of GENERAL MOTORS COMPANY
  9. Disconnect the transmission range selector lever cable terminal (1) from the transmission manual shift lever pin (6).
  10. Slide the retainer (4) forward to release the transmission range selector lever cable (5) from the bracket.
  11. Starter Replacement (LF4 - Automatic Transmission) »Remove
    12. Fig 4: Transmission Fluid Cooler Pipes
    GM4021840Courtesy of GENERAL MOTORS COMPANY
  12. Place an oil drain pan under the transmission fluid cooler pipes (1).
  13. Remove the transmission fluid cooler inlet and outlet pipes (1) from the transmission, and position aside, or remove from the vehicle as necessary. Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LF4 With MG9)Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LF4 With M5U) .
  14. Plug the open fluid ports to prevent fluid loss and contamination.
    15. Fig 5: Transmission Close Out Plug
    GM4022431Courtesy of GENERAL MOTORS COMPANY
  15. Remove the transmission close out plug (1).
  16. Mark the torque converter to flexplate orientation to ensure proper realignment.
    17. Fig 6: Torque Converter Bolts
    GM4023357Courtesy of GENERAL MOTORS COMPANY
  17. Repeat the following steps for all torque converter bolts (1):
    1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt with the starter opening.
    2. Remove and discard the torque converter bolt.
    18. Fig 7: Catalytic Converter Brace Bracket
    GM4023375Courtesy of GENERAL MOTORS COMPANY
  18. Remove the catalytic converter brace bracket (1) from the transmission. Catalytic Converter Brace Bracket Replacement (LF4)
  19. Support the transmission with a suitable transmission jack.
  20. Transmission Support Replacement (Automatic RWD)Transmission Support Replacement (Automatic AWD) »Remove
    21. Fig 8: Transmission Bolts
    GM4023910Courtesy of GENERAL MOTORS COMPANY
  21. Remove the transmission to engine bolts (1, 2, 3, 4).
    22. Fig 9: Right Center Transmission Bolt
    GM4023365Courtesy of GENERAL MOTORS COMPANY
  22. Remove the right center transmission to engine bolt (1).
    23. Fig 10: Transmission Bolts
    GM4020071Courtesy of GENERAL MOTORS COMPANY
  23. Remove the six transmission to engine bolts (1, 2, 4, 5, 6, 7).
  24. Pull the transmission straight back.
  25. Install the J-21366  strap onto the transmission bell housing to retain the torque converter.
  26. Remove the transmission from the vehicle.
    27. Fig 11: Transmission Converter Cover And Bolts
    GM4024322Courtesy of GENERAL MOTORS COMPANY
  27. Remove the transmission converter cover bolts (1) and transmission converter cover.
  28. Transfer components as necessary.
  29. Flush and flow test the transmission cooler and transmission pipes. Transmission Fluid Cooler Flushing and Flow Test (8L90)
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