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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement (Front Wheel Drive With Diesel Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Raise the transmission with the transmission jack and position the transmission to the engine.
  2. Fig 1: Rear Transmission Fasteners
    GM4728700Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  3. Install the rear transmission bolts (1, 2) and tighten to 58 N.m (43 lb ft).
  4. Fig 2: Front Transmission Fasteners
    GM4728678Courtesy of GENERAL MOTORS COMPANY
  5. Install the front transmission bolts (1, 2, 3) and tighten to 58 N.m (43 lb ft).
  6. Install the warm up three-way catalytic converter to the engine. Warm Up Three-Way Catalytic Converter Replacement (LYX)Warm Up Three-Way Catalytic Converter Replacement (LTG)
  7. Remove the transmission jack.
  8. Fig 3: Torque Converter To Flywheel Bolts
    GM4576099Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If reusing the torque converter bolts, clean the threads and apply threadlocker to the threads prior to installation. Refer to Adhesives, Fluids, Lubricants, and Sealers for the recommended threadlock material.

  9. Install the torque converter to flywheel bolts (1) and tighten to 60 N.m (44 lb ft).
  10. Install the starter. Starter Replacement (LYX - All Wheel Drive)Starter Replacement (LTG - All Wheel Drive)Starter Replacement (LH7 - All Wheel Drive)
  11. Install the left transmission mount to the transmission. Transmission Mount Replacement - Left Side 
  12. Install the wheel drive shaft to the transmission. Front Wheel Drive Half Shaft Replacement - Left Side
  13. Connect the right wheel drive shaft to the transmission. Front Wheel Drive Half Shaft Replacement - Right Side (AWD)Front Wheel Drive Half Shaft Replacement - Right Side (M3U, MHG, MNH, MNK with FWD)
  14. Install the drivetrain and front suspension cradle. Drivetrain and Front Suspension Cradle Replacement (All Wheel Drive)
  15. Fig 4: Upper Transmission To Engine Bolts
    GM4665893Courtesy of GENERAL MOTORS COMPANY
  16. Install the upper transmission to engine bolt (1, 2, 3) and tighten to 58 N.m (43 lb ft).
  17. Fig 5: Water Pump Fastener And Water Pump
    GM4576140Courtesy of GENERAL MOTORS COMPANY
  18. Position the water pump (2), the install the water pump fastener (1) and tighten to 9 N.m (80 lb in).
  19. Install the transmission fluid cooler inlet and outlet hoses to the transmission. Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (MNH, MHG)
  20. Fig 6: Control Valve Body Transmission Control Module Electrical Connector
    GM4575898Courtesy of GENERAL MOTORS COMPANY
  21. Connect the control valve body TCM electrical connector (1).
  22. Install the transmission range select lever cable and bracket on the transmission.
  23. Install the battery tray. Battery Tray Replacement
  24. Adjust the automatic transmission range selector lever cable. Range Selector Lever Cable Adjustment 
  25. Fill the transmission with fluid. Transmission Fluid Drain and Fill 
  26. If a NEW TCM has been installed into the vehicle, the NEW module needs to be reprogrammed. Service Programming System (SPS)
  27. NOTE:

    The Transmission Adaptive Values 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:

    • Transmission internal service/overhaul
    • Valve body repair or replacement
    • Control solenoid valve assembly replacement
    • TCM software/calibration update
    • Any service in response to a shift quality concern
  28. Perform the Transmission Adaptive Values Learn procedure. Transmission Adaptive Values Learn 
  29. Road test the vehicle.