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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Manual Transmission - TREMEC 6-Speed (Mg9 M3L)) >> Repair Instructions - On Vehicle >> Transmission Replacement (MG9) >> 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: Catalytic Converter Brace Bracket (LF4)
    GM4020166Courtesy of GENERAL MOTORS COMPANY
  1. Remove the catalytic converter brace bracket. Catalytic Converter Brace Bracket Replacement (LF4)Catalytic Converter Brace Bracket Replacement (LGX)
  2. Disconnect the shift control assembly from the transmission. Shift Control Assembly Replacement (MG9) 
  3. Fig 2: Transmission Clutch Housing Fasteners
    GM4045964Courtesy of GENERAL MOTORS COMPANY
  4. Remove the eight lower transmission clutch housing to engine fasteners (1 through 8).
  5. Disconnect the following electrical connectors:
  6. Fig 3: Transmission Fluid Cooler Pipe Fitting Retainer At Transmission
    GM4050818Courtesy of GENERAL MOTORS COMPANY
  7. Transmission Fluid Cooler Pipe Fitting Retainer @ Transmission - Remove- Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
  8. NOTE:

    Cover or plug all open transmission fluid cooler pipe connection points to help avoid any accidental contamination.

  9. Transmission Fluid Cooler Pipe (Front Jumper Left) @ Transmission - Remove
  10. Fig 4: Transmission Fluid Cooler Inlet And Outlet Pipe Retaining Clip At Transmission
    GM4062437Courtesy of GENERAL MOTORS COMPANY
  11. Transmission Fluid Cooler Inlet and Outlet Pipe Retaining Clip @ Transmission - Remove- Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
  12. NOTE:

    Cover or plug all open transmission fluid cooler pipe connection points to help avoid any accidental contamination.

  13. Transmission Fluid Cooler Inlet and Outlet Pipe @ Transmission - Remove
  14. Fig 5: Hydraulic Clutch Hose/Pipe Retaining Clip To Clutch Slave Cylinder
    GM4163092Courtesy of GENERAL MOTORS COMPANY
  15. Remove the hydraulic clutch hose/pipe (1) retaining clip from the clutch slave cylinder.
  16. Disconnect the hydraulic clutch hose/pipe (2) from the clutch slave cylinder. Plug the lower hose end.
  17. Reposition the thermostat housing. Engine Coolant Thermostat Housing Replacement (LGX)Engine Coolant Thermostat Housing Replacement (LF4)
  18. Remove the engine and transmission as an assembly. Engine Replacement (LF4 (Automatic Transmission))Engine Replacement (LF4 (Manual Transmission))Engine Replacement (LGX, AWD)Engine Replacement (LGX, RWD)
  19. Fig 6: Transmission Clutch Housing Fasteners
    GM4050895Courtesy of GENERAL MOTORS COMPANY
  20. Remove the eight upper transmission clutch housing to engine fasteners (1 through 4).
  21. Separate the transmission from the engine.
  22. Flush and flow test the transmission oil cooler and lines. Transmission Fluid Cooler Flushing and Flow Test (Tremec 6-Speed)Transmission Fluid Cooler Flushing and Flow Test (8L90)