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Home >> Cadillac >> 2017 >> CTS Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Automatic Transmission - 8L45 (M5N) Or 8L90 (M5U) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement (M5N with LTG Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the J-21366  strap from the transmission bell housing.
  2. Install the transmission to the vehicle.
  3. Install the transmission to engine bolts (1, 2, 3) and tighten to 58 N.m (43 lb ft).
    Fig 1: Transmission Bolts
    GM4089977Courtesy of GENERAL MOTORS COMPANY
    CAUTION: Refer to Fastener Caution .
  4. Connect the transmission vent hose (2) and retainer (1).
    Fig 2: Transmission Vent Hose And Retainer
    GM4089964Courtesy of GENERAL MOTORS COMPANY
  5. Install the left upper transmission to engine bolts (1, 2) and tighten to 58 N.m (43 lb ft).
    Fig 3: Left Upper Transmission Bolts
    GM4089960Courtesy of GENERAL MOTORS COMPANY
  6. Install the lower right transmission to engine bolt (1) and tighten to 58 N.m (43 lb ft).
    Fig 4: Lower Right Transmission Bolt
    GM4089412Courtesy of GENERAL MOTORS COMPANY
  7. Install the auxiliary heater pump bracket (3) to the transmission and tighten the fastener (1) to 10 N.m (89 lb in).
    Fig 5: Auxiliary Heater Pump Bracket
    GM4089329Courtesy of GENERAL MOTORS COMPANY
  8. Install the lower right transmission to engine bolt (2) and tighten to 58 N.m (43 lb ft).
  9. Install the lower left transmission to engine bolts (1, 2) and tighten to 58 N.m (43 lb ft).
    Fig 6: Lower Left Transmission Bolts
    GM4089733Courtesy of GENERAL MOTORS COMPANY
  10. Connect the electrical wiring harness retainers to the transmission to engine fasteners and to the transmission case.
  11. Install the transmission support. Refer to Transmission Support Replacement (RWD) and Transmission Support Replacement (AWD)
  12. Remove the transmission jack from under the vehicle.
  13. Align the torque converter to flexplate orientation marks made during the removal procedure.
  14. Complete the following steps for all torque converter bolts (1):
    Fig 7: Torque Converter Bolts
    GM4089372Courtesy of GENERAL MOTORS COMPANY
    NOTE: Torque converter bolts are self-locking and must be replaced with NEW torque converter bolts every time the bolts are removed.
    1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt holes in the flexplate with the starter opening in the engine block.
    2. Install all NEW torque converter bolts (1) and tighten to 63 N.m (46 lb ft).
  15. Install the transmission close out plug (1).
    Fig 8: Transmission Close Out Plug
    GM4089020Courtesy of GENERAL MOTORS COMPANY
  16. Install the catalytic converter shield (4) to the engine assembly and tighten the fasteners (1, 2, 3) to 10 N.m (89 lb in).
    Fig 9: Catalytic Converter Shield
    GM4089948Courtesy of GENERAL MOTORS COMPANY
  17. Catalytic Converter Replacement (LTG) » Install
  18. Install the catalytic converter bracket (2) to the transmission.
    Fig 10: Catalytic Converter Bracket
    GM4088805Courtesy of GENERAL MOTORS COMPANY
  19. Install the fasteners (1, 3) and tighten to 22 N.m (16 lb ft).
  20. Install the transmission fluid cooler inlet and outlet pipe (1) to the transmission. Refer to Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With AWD, With V03)Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With AWD, Without V03)Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With RWD, With V03)
    Fig 11: Transmission Fluid Cooler Pipes
    GM4083607Courtesy of GENERAL MOTORS COMPANY
  21. Connect the wiring harness retainers and connectors to the transmission.
  22. Install the cable in the bracket, then slide the retainer (4) rearward to lock the transmission range selector lever cable in the bracket.
    Fig 12: Transmission Range Selector Lever Cable
    GM4032383Courtesy of GENERAL MOTORS COMPANY
  23. Connect the transmission range selector lever cable terminal (1) to the transmission manual shift lever pin (2).
  24. Adjust the cable. Refer to Range Selector Lever Cable Adjustment 
  25. Two-Piece Propeller Shaft Replacement (LT4, LTG) » Install
  26. {If equipped} Front Axle Propeller Shaft Replacement » Install
  27. Starter Replacement (LTG) » Install
  28. Connect the charge air cooler outlet air tube to the throttle body. Refer to Charge Air Cooler Outlet Air Tube Replacement
  29. Check the transmission fluid level and fill if necessary. Refer to Transmission Fluid Level and Condition Check
  30. Lower the vehicle.
  31. Perform the solenoid valve characterization. Refer to Solenoid Valve Characterization Reprogramming
  32. Perform the service fast learn procedure. Refer to Transmission Service Fast Learn Procedure
    NOTE:

    The Service Fast Learn procedure must be performed when one of the following repairs have been made to the vehicle. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, as well as transmission DTCs being set:

    The service fast learn procedure must be performed when any of the following repairs has been made to the transmission.

    • Pressure regulating solenoid replacement
    • Valve body repair or replacement
    • Any service/repair in response to a shift quality concern
    • Any internal transmission service, repair, overhaul or replacement
    • Torque converter replacement
    • TCM replacement
    • Transmission assembly replacement
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