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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 >> Manual Transmission Removal and Installation >> Removal Procedure

Removal 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. Apply the parking brake.
  2. Place the transmission control in the Neutral position.
  3. CAUTION:

    With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components:

    • The steering column
    • The intermediate shaft (s)
    • The steering gear

    After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has become un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil.

  4. Secure the steering wheel so it will not turn when the mid intermediate steering shaft is disconnected.
  5. GM5868061Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The transmission control lever boot and knob are replaced as an assembly.

    Using a flat bladed trim tool, detach the manual transmission control lever boot (2) from the console.

  6. Lift the manual transmission control lever boot (2) to access the manual transmission control lever knob bolt (3).
  7. Remove the manual transmission control lever knob bolt (3), then lift off the manual transmission control lever boot and knob as an assembly (1, 2).
  8. GM5868024Courtesy of GENERAL MOTORS COMPANY

    Using a flat-bladed plastic trim tool, release the retaining clips.

  9. Reposition the front floor console trim plate (1) to access the electrical connector.
  10. GM5873058Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Disconnect the instrument panel harness connector (1) from the front floor console wiring harness extension harness.

  11. GM5868026Courtesy of GENERAL MOTORS COMPANY

    Front Floor Console Trim Plate (1) - Remove

  12. Disconnect the electrical connectors.
  13. GM5868067Courtesy of GENERAL MOTORS COMPANY

    Remove the manual transmission control lever lower boot (1) from the manual transmission control (2).

  14. GM5868075Courtesy of GENERAL MOTORS COMPANY

    Remove the 4 manual transmission control bracket bolts (1, 2) securing the manual transmission control assembly to the tunnel reinforcement.

  15. Push the tabs on the closeout boot (1) inward and down to clear the body structure.
  16. Remove the tire and wheel assembly. Tire and Wheel Removal and Installation
  17. 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 Retainer (2) - Remove

  18. Engine Front Splash Shield Bolt (1) - Remove [3x]
  19. Engine Front Splash Shield (3) - Remove
  20. GM5869096Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Front Wheelhouse Liner Bolt (1) - Remove [3x]

  21. Rocker Panel Protector (2) - Remove
  22. GM5867323Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Fascia Air Deflector Bolt (1) - Remove [4x]

  23. Front Bumper Fascia Air Deflector- Outer (2) - Remove
  24. GM5867673Courtesy of GENERAL MOTORS COMPANY

    Front Wheelhouse Liner Retainer (1) - Remove [3x]

  25. Front Wheelhouse Liner Bolt (2) - Remove [9x]
  26. Front Wheelhouse Liner (3) - Remove
  27. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector Bolt- Left Side and Right Side (1) - Remove [4x]

  28. Rear Tire Front Air Deflector- Left Side and Right Side (2) - Remove [2x]
  29. GM5336153Courtesy of GENERAL MOTORS COMPANY

    Mid Intermediate Steering Shaft Bolt (2) - Remove

  30. Separate the mid intermediate steering shaft from the intermediate steering shaft by pushing the upper portion of the intermediate shaft (1) downward.
  31. GM5336155Courtesy of GENERAL MOTORS COMPANY

    Mid Intermediate Steering Shaft Bolt (1) - Remove

  32. GM5336157Courtesy of GENERAL MOTORS COMPANY

    Mid Intermediate Steering Shaft (1) - Remove

  33. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Bolt- Left Side (1) - Remove

  34. Underbody Rear Air Deflector Nut- Left Side (2) - Remove [3x]
  35. Underbody Rear Air Deflector Bolt- Left Side (3) - Remove [3x]
  36. Underbody Rear Air Deflector Nut- Left Side (4) - Remove [2x]
  37. Underbody Rear Air Deflector- Left Side (5) - Remove
  38. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Bolt- Right Side (1) - Remove

  39. Underbody Rear Air Deflector Bolt- Right Side (2) - Remove [3x]
  40. Underbody Rear Air Deflector Nut- Right Side (3) - Remove [3x]
  41. Underbody Rear Air Deflector Nut- Right Side (4) - Remove [2x]
  42. Underbody Rear Air Deflector- Right Side (5) - Remove
  43. GM5839256Courtesy of GENERAL MOTORS COMPANY

    Underbody Front Air Deflector Bolt- Right Side (1) - Remove [6x]

  44. Underbody Rear Air Deflector Nut- Right Side (2) - Remove [5x]
  45. Transmission Fluid Cooler Pipe Bracket Bolt- Right Side (3) - Remove [2x]
  46. Underbody Rear Air Deflector- Right Side (5) - Remove
  47. GM5854893Courtesy of GENERAL MOTORS COMPANY

    Underbody Front Air Deflector Bolt- Left Side (1) - Remove [6x]

  48. Underbody Rear Air Deflector Nut- Left Side (2) - Remove [5x]
  49. Transmission Fluid Cooler Pipe Bracket Bolt- Left Side (3) - Remove [2x]
  50. Underbody Rear Air Deflector- Left Side (5) - Remove
  51. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Remove [6x]

  52. Floor Panel Reinforcement (2) - Remove
  53. GM5865265Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Remove [2x]

  54. GM5865271Courtesy of GENERAL MOTORS COMPANY

    Exhaust Pipe Clamp (1) - Loosen [2x]

  55. GM5406578Courtesy of GENERAL MOTORS COMPANY

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

  56. GM5406632Courtesy of GENERAL MOTORS COMPANY

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

  57. GM5865287Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  58. GM5865293Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  59. GM5865300Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Exhaust Muffler Hanger Bracket Nut (1) - Remove [4x]

  60. GM5865329Courtesy of GENERAL MOTORS COMPANY

    With the aid of an assistant, remove the exhaust muffler (1).

  61. Catalytic Converter Gasket (2) - Remove and DISCARD
  62. GM5865888Courtesy of GENERAL MOTORS COMPANY

    Exhaust Heat Shield Bolt (1) - Remove [2x]

  63. Exhaust Intermediate Underbody Heat Shield (2) - Remove
  64. GM5334717Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 2 Cross Bar Reinforcement Bolt (1) - Remove [4x]

  65. Floor Panel Number 2 Cross Bar Reinforcement (2) - Remove
  66. GM5867501Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Before removing the propeller shaft from the vehicle, paint or scribe references marks on the transmission flange to the propeller shaft and the rear differential drive flange to ensure minimal driveline system imbalance.

    Mark (2) the relationship of the propeller shaft flange (3) and the output flange (1) of the transmission.

  67. GM5863695Courtesy of GENERAL MOTORS COMPANY

    Mark (3) the relationship of the propeller shaft flange (1) and the rear axle pinion flange (2).

  68. GM5867502Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the propeller shaft is secured to the jack stand.

    Support the propeller shaft with a suitable jack stand.

  69. Remove the 3 front propeller shaft bolts (2) and the 3 front propeller shaft nuts (1).
  70. GM5863697Courtesy of GENERAL MOTORS COMPANY

    Remove the 3 rear propeller shaft bolts (1) and the 3 rear propeller shaft nuts (2).

  71. GM5863691Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 propeller shaft bearing support bolts (1).

  72. GM5863853Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Care should be taken not to use sharp or pry tools when separating the propeller shaft coupler from the drive flange. Damage to the coupler could result and replacement of the entire propeller shaft would be required.

    NOTE:

    It may be necessary to apply a small amount of penetrating lubricant or WD-40® to the location to aid in separation of the propeller shaft coupling.

    If the propeller shaft does not easily separate from the differential, transmission, use a rubber mallet to gently tap the locations (1) on the rubber coupling to separate.

  73. GM5867503Courtesy of GENERAL MOTORS COMPANY

    Remove the propeller shaft (1) from the vehicle.

  74. Using a suitable jack stand, support the rear of the transmission.
  75. GM5867366Courtesy of GENERAL MOTORS COMPANY

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

  76. GM5867368Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bolt (1) - Remove [2x]

  77. Transmission Mount (2) - Remove
  78. Lower the transmission assembly to gain access to the top of the transmission.
  79. GM5868084Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 manual transmission control lever base pin retainers (1).

  80. Remove the manual transmission control lever base pin (3).
  81. GM5868083Courtesy of GENERAL MOTORS COMPANY

    Using a suitable flat-blade tool, release the left side manual transmission control lever base pin retaining tab (1), while sliding the manual transmission control lever base pin (2) outward. The pin will lock again at the outer transmission boss. Using a suitable flat-blade tool, insert the tool between the boss and the rubber mount on the shift control assembly to release the manual transmission control lever base pin retaining tab to slide it further out of the transmission boss. Reposition the transmission slightly to allow extra clearance to completely remove the manual transmission control lever base pin.

  82. Using a suitable flat-blade tool, release the right side manual transmission control lever base pin retaining tab (1), while sliding the manual transmission control lever base pin (2) outward. The manual transmission control lever base pin will lock again at the outer transmission boss. Using a suitable flat-blade tool, insert the tool between the boss and the rubber mount on the shift control assembly to release the manual transmission control lever base pin retaining tab to slide it further out of the transmission boss. Reposition the transmission slightly to allow extra clearance to completely remove the manual transmission control lever base pin.
  83. Remove the manual transmission control from the transmission.
  84. GM5866958Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Bolt (4) - Remove

  85. Transmission Fluid Cooler Pipe Bracket Bolt (3) - Remove
  86. Retainer Clip (1) - Disengage [2x]
  87. Transmission Fluid Cooler Pipe - (2) Disconnect
  88. Transmission Fluid Cooler Pipe - (2) Remove
  89. GM4203412Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connectors.

    • Oxygen Sensor (1)
    • Fluid Temperature Sensor (2)
    • Skip Shift Solenoid (3)
    • Reverse Lockout Solenoid (4)
  90. Disconnect the wiring harness clips (5) from the transmission.
  91. GM4163092Courtesy of GENERAL MOTORS COMPANY

    Remove the hydraulic clutch hose/pipe retaining clip (1) from the clutch slave cylinder.

  92. CAUTION:

    Care must be taken when disassembling the clutch actuator cylinder hose connector from the clutch actuator cylinder. Do not remove, mispositioned, or damage the internal restrictor valve/Peak Torque Limiter (PTL). Operating a vehicle with a removed, mispositioned, or damaged PTL valve could result in severe driveline damage.

  93. Disconnect the hydraulic clutch hose/pipe (2) from the clutch slave cylinder.
  94. Cap the opening to prevent contamination.
  95. GM4204065Courtesy of GENERAL MOTORS COMPANY

    Remove the lower transmission clutch housing to engine fasteners (1, 2).

  96. GM4921039Courtesy of GENERAL MOTORS COMPANY

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

  97. GM4921062Courtesy of GENERAL MOTORS COMPANY

    Remove the four upper transmission clutch housing to engine fasteners (1).

  98. GM4921821Courtesy of GENERAL MOTORS COMPANY
    NOTE:

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

    Loosen the four front cradle bolts (1), and remove the four rear cradle bolts (2) to allow the rear of the cradle support to tilt down with the jack approximately 125 mm (5 in).

  99. Support the transmission with a suitable transmission jack.
  100. GM4921077Courtesy of GENERAL MOTORS COMPANY

    Remove the left side lower transmission clutch housing to engine fastener (1).

  101. GM4204722Courtesy of GENERAL MOTORS COMPANY

    Remove the right side lower transmission clutch housing to engine fastener (1).

  102. NOTE:

    Do not leave the engine tilted on its mounts for an extended amount of time.

  103. Remove the transmission from the vehicle. To clear the body structure, the front of the engine can be pushed up to tilt the engine and transmission.
  104. Inspect the transmission fluid cooler, hoses, and pipes for leaks or damage. Replace as necessary.