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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Manual Transmission - TREMEC 6-Speed (Mg9) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Note the new transmission unique number (TUN).
    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.

  2. Clean the clutch hub and the input shaft from any debris and contaminates with a lint-free towel.
  3. 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.

    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.

  4. 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.

    Clean the entire lead surface of the input shaft with a NEW, lint-free towel (1).

  5. Raise the transmission to the engine.
  6. GM4204853Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Install the three upper transmission clutch housing to engine fasteners (1, 2, 3) and tighten. Fastener Specifications

  7. GM4204722Courtesy of GENERAL MOTORS COMPANY

    Install the right lower transmission clutch housing to engine fastener (1) and tighten. Fastener Specifications

  8. GM4204065Courtesy of GENERAL MOTORS COMPANY

    Install the lower transmission clutch housing to engine fasteners (1, 2) and tighten. Fastener Specifications

  9. GM4204785Courtesy of GENERAL MOTORS COMPANY

    Install the left side transmission clutch housing to engine fasteners (1, 2) and tighten. Fastener Specifications

  10. GM4921039Courtesy of GENERAL MOTORS COMPANY

    Connect the wiring harness retainers (1) to the transmission clutch housing to engine fasteners.

  11. GM4921821Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Securely support the drivetrain and front suspension cradle with an adjustable jack.

    Tilt engine and transmission up and tighten four front cradle bolts (1), and four rear cradle bolts (2). Fastener Specifications

    12. NOTE:

    Before installing the manual transmission control, ensure that the shift shaft it is clean of dirt or lubricants.

  12. Install the manual transmission control to the transmission.
  13. GM5868083Courtesy of GENERAL MOTORS COMPANY

    Install the right manual transmission control lever base pin (2).

  14. Install the left manual transmission control lever base pin (2).
  15. GM5868084Courtesy of GENERAL MOTORS COMPANY

    Install the manual transmission control lever base pin (2).

  16. Install the 2 manual transmission control lever base pin retainers (1).
  17. GM5867368Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount (2) - Install

    18. NOTE:

    For proper bolt alignment, loosely install all mount bolts prior to tightening to specifications.

  18. Transmission Mount Bolt (1) - Loosely install [2x]
  19. GM5867366Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bracket Bolt (1) - Loosely install [4x]

  20. GM5867368Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bolt (1) - Tighten [2x] - Fastener Specifications

  21. GM5867366Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bracket Bolt (1) - Tighten [4x] - Fastener Specifications

  22. Remove the jack stand.
  23. GM5867503Courtesy of GENERAL MOTORS COMPANY

    Position the propeller shaft (1) in the vehicle.

  24. GM5863691Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  25. Install the 2 propeller shaft bearing support bolts (1) and tighten. Fastener Specifications
  26. GM5863695Courtesy of GENERAL MOTORS COMPANY

    Align the reference mark (3) between the propeller shaft flange (1) and the rear axle pinion flange (2).

  27. GM5863697Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  28. Install the 3 rear propeller shaft nuts (2) and 3 the rear propeller shaft bolts (1).
  29. Tighten the 3 the rear propeller shaft bolts (1). Fastener Specifications
  30. GM5867501Courtesy of GENERAL MOTORS COMPANY

    Align the reference mark (2) between the propeller shaft flange (3) and the output flange (1) of the transmission.

  31. GM5867502Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  32. Install the 3 front propeller shaft nuts (1) and the 3 front propeller shaft bolts (2).
  33. Tighten the 3 front propeller shaft bolts (1). Fastener Specifications
  34. GM5334717Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 2 Cross Bar Reinforcement (2) - Install

  35. Floor Panel Number 2 Cross Bar Reinforcement Bolt (1) - Install and tighten [4x] - Fastener Specifications
  36. GM5865888Courtesy of GENERAL MOTORS COMPANY

    Exhaust Intermediate Underbody Heat Shield (2) - Install

  37. Exhaust Heat Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications
  38. GM5865329Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  39. With the aid of an assistant, install the exhaust muffler (1).
  40. GM5865300Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler Hanger Bracket Nut (1) - Install and tighten [4x] - Fastener Specifications

  41. GM5865293Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  42. GM5865287Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  43. GM5406632Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install [2x]

  44. GM5406578Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install [2x]

  45. GM5865271Courtesy of GENERAL MOTORS COMPANY

    Exhaust Pipe Clamp (1) - Tighten [2x] - Fastener Specifications

  46. GM5865265Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications

  47. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  48. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  49. GM5854893Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Left Side (5) - Install

  50. Underbody Rear Air Deflector Bolt- Left Side (4) - Install and tighten [2x] - Fastener Specifications
  51. Transmission Fluid Cooler Pipe Bracket Bolt- Left Side (3) - Install and tighten [2x] - Fastener Specifications
  52. Underbody Rear Air Deflector Nut- Left Side (2) - Install and tighten [5x] - Fastener Specifications
  53. Underbody Front Air Deflector Bolt- Left Side (1) - Install and tighten [6x] - Fastener Specifications
  54. GM5839256Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Right Side (5) - Install

  55. Underbody Rear Air Deflector Bolt- Right Side (4) - Install and tighten [2x] - Fastener Specifications
  56. Transmission Fluid Cooler Pipe Bracket Bolt- Right Side (3) - Install and tighten [2x] - Fastener Specifications
  57. Underbody Rear Air Deflector Nut- Right Side (2) - Install and tighten [5x] - Fastener Specifications
  58. Underbody Front Air Deflector Bolt- Right Side (1) - Install and tighten [6x] - Fastener Specifications
  59. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Right Side (5) - Install

  60. Underbody Rear Air Deflector Nut- Right Side (3) - Install and tighten [3x] - Fastener Specifications
  61. Underbody Rear Air Deflector Bolt- Right Side (2) - Install and tighten [3x] - Fastener Specifications
  62. Underbody Rear Air Deflector Nut- Right Side (4) - Install and tighten [2x] - Fastener Specifications
  63. Rear Wheelhouse Liner Bolt- Right Side (1) - Install and tighten - Fastener Specifications
  64. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Left Side (5) - Install

  65. Underbody Rear Air Deflector Nut- Left Side (2) - Install and tighten [3x] - Fastener Specifications
  66. Underbody Rear Air Deflector Bolt- Left Side (3) - Install and tighten [3x] - Fastener Specifications
  67. Underbody Rear Air Deflector Nut- Left Side (4) - Install and tighten [2x] - Fastener Specifications
  68. Rear Wheelhouse Liner Bolt- Left Side (1) - Install and tighten - Fastener Specifications
  69. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector- Left Side and Right Side (2) - Install [2x]

  70. Rear Tire Front Air Deflector Bolt- Left Side and Right Side (1) - Install and tighten [4x] - Fastener Specifications
  71. GM5868075Courtesy of GENERAL MOTORS COMPANY

    Pull up and outward on the tabs on the closeout boot (3) to clear the body structure.

  72. Install the 4 manual transmission control bracket bolts (1, 2) securing the shift control assembly to the tunnel reinforcement, then tighten. Fastener Specifications
  73. GM5868067Courtesy of GENERAL MOTORS COMPANY

    Install the manual transmission control lever lower boot (1) to the manual transmission control (2).

  74. Connect the electrical connector.
  75. GM5868026Courtesy of GENERAL MOTORS COMPANY

    Connect the electrical connector.

  76. Front Floor Console Trim Plate (1) - Install
  77. GM5868061Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  78. Position the transmission control lever boot and knob assembly (1, 2) on the manual transmission control lever.
  79. Tighten the manual transmission control lever knob bolt (3). Fastener Specifications
  80. Install the manual transmission control lever boot (2) to the console.
  81. GM5336157Courtesy of GENERAL MOTORS COMPANY

    Mid Intermediate Steering Shaft (1) - Install

  82. GM5336155Courtesy of GENERAL MOTORS COMPANY

    If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:

    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  83. Mid Intermediate Steering Shaft Bolt (1) - Install and tighten - Fastener Specifications
  84. GM5336153Courtesy of GENERAL MOTORS COMPANY

    Install the mid intermediate steering shaft to the intermediate steering shaft by sliding the upper portion of the intermediate shaft (1) upward.

  85. If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  86. Mid Intermediate Steering Shaft Bolt (2) - Install and tighten - Fastener Specifications
  87. GM5867673Courtesy of GENERAL MOTORS COMPANY

    Front Wheelhouse Liner (3) - Install

  88. Front Wheelhouse Liner Bolt (2) - Install and tighten [9x] - Fastener Specifications
  89. Front Wheelhouse Liner Retainer (1) - Install [3x]
  90. GM5867323Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Fascia Air Deflector- Outer (2) - Install

  91. Front Bumper Fascia Air Deflector Bolt (1) - Install and tighten [4x] - Fastener Specifications
  92. GM5869096Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Rocker Panel Protector (2) - Install

  93. Front Wheelhouse Liner Bolt (1) - Install and tighten [3x] - Fastener Specifications
  94. GM5867672Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Quantity of fasteners may vary based on option content.
    • Some components not shown for graphic clarity.

    Engine Front Splash Shield (3) - Install

  95. Engine Front Splash Shield Bolt (1) - Install and tighten [4x] - Fastener Specifications
  96. Engine Front Splash Shield Retainer (2) - Install
  97. Install the tire and wheel assembly. Tire and Wheel Removal and Installation
  98. Uncap the fittings and unplug the holes of the transmission.
  99. GM4163092Courtesy of GENERAL MOTORS COMPANY

    Connect the lower slave cylinder hose (2) to the slave cylinder.

  100. Install the hydraulic clutch hose/pipe retaining clip (1) to the clutch slave cylinder.
  101. GM4203412Courtesy of GENERAL MOTORS COMPANY

    Connect the wiring harness clips (5) from the transmission.

  102. Connect the electrical connectors. (1, 2, 3, 4)
  103. GM5866958Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe (2) - Install

  104. Transmission Fluid Cooler Pipe (2) - Connect
  105. Retainer Clip (1) - Engage [2x]
  106. Transmission Fluid Cooler Pipe Bracket Bolt (3) - Install and tighten - Fastener Specifications
  107. Transmission Fluid Cooler Pipe Bolt (4) - Install and tighten - Fastener Specifications
  108. Bleed to hydraulic clutch system. Hydraulic Clutch System Bleeding
  109. Check the transmission fluid level. Transmission Fluid Level Inspection 
  110. Remove the support and lower the vehicle.
  111. Remove the device used to prevent steering column rotation.
  112. Inspect the exhaust system for leaks.
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