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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 398 (Automatic Transmission - 6T50 (M2D) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement (Front Wheel Drive) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the battery tray. Refer to Battery Tray Replacement .
  2. Disconnect the transmission range select lever cable to the transmission. Refer to Range Selector Lever Cable Replacement 
  3. Disconnect the transmission range select lever cable from the transmission. Refer to Range Selector Lever Cable Replacement 
  4. Drain the transmission fluid. Refer to Transmission Fluid Drain and Fill 
  5. Fig 1: Control Valve Body Transmission Control Module (TCM) Electrical Connector
    GM1999448Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the control valve body transmission control module (TCM) electrical connector (1) then unclip the connector from the transmission.
  7. Fig 2: Fluid Cooler Inlet Hose, Outlet Hose, Retainer And Nuts
    GM1998666Courtesy of GENERAL MOTORS COMPANY
  8. Remove the transmission fluid cooler inlet (1) and outlet (5) hoses from the retainer (2) on the control valve body cover.
  9. Remove the transmission fluid cooler inlet hose nut (3) from the transmission.
  10. Remove the transmission fluid cooler inlet hose (1) from the transmission.
  11. Remove the transmission fluid cooler outlet hose nut (4) from the transmission.
  12. Remove the transmission fluid cooler outlet hose (5) from the transmission.
  13. Plug and/or cap the hose and transmission to prevent contamination.
  14. Fig 3: Upper Transmission To Engine Bolts
    GM4375268Courtesy of GENERAL MOTORS COMPANY
  15. Remove the upper transmission to engine bolts (1, 2, 3).
  16. Install the engine support fixture. Refer to Engine Support Fixture
  17. Remove the drivetrain and front suspension cradle. Refer to Drivetrain and Front Suspension Cradle Removal and Installation (FWD)
  18. Disconnect the wheel drive shafts from the transmission. Refer to Front Wheel Drive Half Shaft Replacement - Left Side , and Front Wheel Drive Shaft Replacement - Right Side (FWD)
  19. Remove the rear transmission mount from the transmission. Refer to Transmission Rear Mount Replacement (Front Wheel Drive) 
  20. Remove the front transmission mount from the transmission. Refer to Transmission Front Mount Replacement 
  21. Remove the starter. Refer to Starter Replacement (LGX)Starter Replacement (LCV - FWD)
  22. Mark the relationship of the flywheel to the torque converter for reassembly.
  23. Fig 4: Torque Converter To Flywheel Bolts
    GM4316014Courtesy of GENERAL MOTORS COMPANY
  24. Remove the torque converter to flywheel bolts (1).
  25. Lower the vehicle.
  26. Fig 5: Left Transmission Mount To Transmission Bolts
    GM4361428Courtesy of GENERAL MOTORS COMPANY
  27. Remove the left transmission mount to transmission bolts (3). Refer to Transmission Mount Replacement - Left Side 
  28. Lower the transmission side with the support fixture to allow clearance for removal.
  29. Unclip the engine wiring harness from the transmission.
  30. Raise the vehicle.
  31. Use a transmission jack in order to support the transmission.
  32. Remove the oil pump flow control valve heat shield. Refer to Oil Pump Flow Control Valve Heat Shield Replacement
  33. Fig 6: Front Transmission To Engine Bolts
    GM4375284Courtesy of GENERAL MOTORS COMPANY
  34. Remove the front transmission to engine bolts (1, 2, 3).
  35. Fig 7: Lower Rear Transmission Fasteners
    GM4375296Courtesy of GENERAL MOTORS COMPANY
  36. Remove the lower rear transmission fasteners (1, 2).
  37. NOTE:

    Ensure the torque converter remains securely in place on the transmission input shaft while separating and removing the transmission.

  38. Separate the transmission from the engine.
  39. Lower the transmission with the transmission jack far enough to remove the transmission.
  40. Transfer components as necessary.
  41. Flush and flow test the transmission oil cooler and lines. Refer to Transmission Fluid Cooler Flow Test and Flushing