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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Manual Transmission - TREMEC 6-Speed (M3L Mg9)) >> Repair Instructions - On Vehicle >> Transmission Replacement (MG9) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION:

    It is extremely important to set the clutch pilot bearing to the correct depth. Failure to set the pilot bearing to the prescribed depth will result in bearing failure. A new bearing should be used anytime an adjustment is needed.

  1. Set the crankshaft pilot bearing to the proper depth. Refer to Clutch Pilot Bearing Installation
  2. WARNING:

    Use care when cleaning the clutch hub. The clutch hub may have sharp edges and can cause personal injury if contact is made. Wear protective gloves to avoid personal injury.

  3. Clean the clutch hub and the input shaft from any debris and contaminates with a lint-free towel.
  4. Fig 1: Applying Light Coating Of Multi-Purpose Grease
    GM2665890Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Applying too much or the wrong type of grease on the transmission input shaft may cause damage, clutch slippage or failure. Always apply the correct type of grease. Never apply more grease than is necessary to coat the transmission input shaft with a very thin film of grease.

  5. Use a clean flat brush (1) to apply very light coating of multi-purpose grease to input shaft until the metal is only shiny. No visible clumps of grease are permissible regardless of size. Smear away from the transmission in direction of the shown arrow.
  6. Fig 2: Cleaning Lead Surface Of Input Shaft With Lint-Free Towel
    GM2665891Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Ensure that no grease remains on the lead surface of the transmission input shaft. Clean the lead surface of the transmission input shaft prior to the assembly of the transmission to the engine. Failure to maintain a clean surface may cause clutch slippage or failure.

  7. Clean the entire lead surface of the input shaft with a NEW, lint-free towel (1).
  8. Position the transmission to the engine.
  9. Fig 3: Upper Transmission Clutch Housing Fasteners
    GM4050895Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  10. Install the four upper transmission clutch housing to engine fasteners (1 through 4) and tighten to 50 N.m (37 lb ft).
  11. Install the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LF4)
  12. Install the engine and transmission as an assembly. Refer to Engine Replacement (LF4 (Manual Transmission))
  13. Fig 4: Lower Transmission Clutch Housing Fasteners
    GM4045964Courtesy of GENERAL MOTORS COMPANY
  14. Install the eight lower transmission clutch housing to engine fasteners (1) and tighten to 50 N.m (37 lb ft).
  15. Fig 5: Catalytic Converter Brace Bracket (LF4)
    GM4020166Courtesy of GENERAL MOTORS COMPANY
  16. Install the catalytic converter brace bracket. Refer to Catalytic Converter Brace Bracket Replacement (LF4)
  17. Fig 6: Hydraulic Clutch Hose/Pipe And Retaining Clip At Clutch Slave Cylinder
    GM4163092Courtesy of GENERAL MOTORS COMPANY
  18. Connect the hydraulic clutch hose/pipe (2) to the clutch slave cylinder.
  19. Connect the hydraulic clutch hose/pipe (1) retaining clip to the clutch slave cylinder.
  20. Connect the shift control assembly to the transmission. Refer to Shift Control Assembly Replacement (MG9) 
  21. Fig 7: Transmission Fluid Cooler Inlet And Outlet Pipe And Retaining Clip At Transmission
    GM4062437Courtesy of GENERAL MOTORS COMPANY
  22. Install Transmission Fluid Cooler Inlet and Outlet Pipe Clip (1) @ Transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
  23. Install Transmission Fluid Cooler Inlet and Outlet Pipe (2) @ Transmission
  24. Fig 8: Transmission Fluid Cooler Pipe And Fitting Retainer At Transmission
    GM4050818Courtesy of GENERAL MOTORS COMPANY
  25. Install Transmission Fluid Cooler Pipe Fitting Retainer (1) @ Transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
  26. Install Transmission Fluid Cooler Pipe (Front Jumper Left) (2) @ Transmission
  27. Connect the following electrical connectors:
  28. Bleed to hydraulic clutch system. Refer to Hydraulic Clutch System Bleeding .
  29. Check the transmission fluid and fill as necessary. Refer to Transmission Fluid Level Inspection (MG9) .
  30. Perform the gear position relearn. Refer to Gear Position Sensor Learn