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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 114 (Manual Transmission - TREMEC 6-Speed (Mg9) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Transmission Disassemble >> Special Tools

Special Tools

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.

Equivalent regional tools: Special Tools

  1. Drain the fluid from the transmission. Transmission Fluid Drain and Fill
  2. Remove the transmission. Manual Transmission Removal and Installation
  3. GM4055387Courtesy of GENERAL MOTORS COMPANY

    Install the DT-47678  Transmission Holding Fixture (2) and the DT-47678-10  Transmission Holding Fixture Adapter (3) to the transmission (4).

  4. Mount the transmission (4) on a workbench using the DT-03289-20  Holding Fixture (1).
  5. Rotate the transmission (4) into a horizontal position.
  6. Shift the transmission into NEUTRAL (N).
  7. GM4055388Courtesy of GENERAL MOTORS COMPANY

    Shift Control Shaft Cover Bolt (3) - Remove and DISCARD [4x]

  8. Shift Control Shaft Cover (2) - Remove
  9. Shift Control Shaft Cover Seal (1) - Remove and DISCARD
  10. GM4055391Courtesy of GENERAL MOTORS COMPANY

    Install the DT-45012  Pinion Flange Holder (4) to the propeller shaft transmission yoke (3).

  11. Using a socket wrench, remove and DISCARD the propeller shaft transmission yoke nut (1).
  12. Propeller Shaft Transmission Yoke Washer (2) - Remove and DISCARD
  13. GM4055392Courtesy of GENERAL MOTORS COMPANY

    Using the DT-45019  Flange and Pinion Cage Remover (2), remove the propeller shaft transmission yoke (1).

  14. GM4055394Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Only remove the bolts from the gear position sensor plate. Do NOT remove the 2 bolts from the sensor.

    Manual Transmission Gear Position Sensor Bolt (1) - Remove and DISCARD [4x]

  15. Manual Transmission Gear Position Sensor (2) - Remove
  16. Manual Transmission Gear Position Sensor Seal (3) - Remove and DISCARD
  17. GM4055395Courtesy of GENERAL MOTORS COMPANY

    Shift Shaft Detent Lever Bolt (2) - Remove

  18. Shift Fork Position Sensor Magnet (1) - Remove
  19. GM4055396Courtesy of GENERAL MOTORS COMPANY

    Transmission Extension Bolt (1) - Remove and DISCARD [6x]

  20. Transmission Extension Nut (2) - Remove and DISCARD [2x]
  21. Transmission Fluid Auxiliary Cooler Pipe Bracket (3) - Remove
  22. Transmission Fluid Cooler Upper Extension Pipe Clip Bracket (4) - Remove [2x]
  23. Transmission Extension (5) - Remove
  24. Transmission Extension Gasket (6) - Remove and DISCARD
  25. GM2102199Courtesy of GENERAL MOTORS COMPANY

    Shift Shaft Detent Plug (1) - Remove and DISCARD

  26. Shift Shaft Detent Spring (2) - Remove
  27. Shift Shaft Detent Roller (3) - Remove
  28. GM2397545Courtesy of GENERAL MOTORS COMPANY

    Using a suitable tool, remove and DISCARD the 1st and 2nd shift fork pin (2).

  29. Remove the offset shift lever (1).
  30. GM2397546Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the main shaft bearing retaining ring (1).

  31. Using the EN-38416-B  Harmonic Balancer Remover (3), remove the vehicle speed sensor reluctor wheel (2).
  32. GM2397547Courtesy of GENERAL MOTORS COMPANY

    Main Shaft Bearing Retaining Ring (1) - Remove and DISCARD

  33. Reverse Gear Thrust Washer (3) - Remove [2x]
  34. Main Shaft Rear Bearing (2) - Remove
  35. GM5898569Courtesy of GENERAL MOTORS COMPANY

    Main Shaft Bearing Retaining Ring (1) - Remove and DISCARD

  36. Reverse Gear Thrust Washer (2) - Remove
  37. Reverse Gear (3) - Remove
  38. Reverse Gear Bearing (4) - Remove
  39. Remove the reverse gear blocking ring (5), which includes the following components:
    • Reverse gear synchronizer inner cone
    • Reverse gear synchronizer outer cone
    • Reverse Gear Blocking Ring
  40. GM2397549Courtesy of GENERAL MOTORS COMPANY

    Reverse Gear Retaining Ring (2) - Remove and DISCARD

  41. Reverse Shift Fork Retaining Ring (1) - Remove and DISCARD
  42. GM5892507Courtesy of GENERAL MOTORS COMPANY

    Scribe a mark on the reverse gear synchronizer hub (1) and on the reverse gear synchronizer sleeve (2). This will help you to reinstall the parts in the same position.

  43. GM2397550Courtesy of GENERAL MOTORS COMPANY

    Remove the reverse shift fork, synchronizer and inserts (1).

  44. 5th Gear Thrust Washer (2) - Remove and DISCARD
  45. Remove the two piece reverse gear retaining ring (3).
  46. GM5898577Courtesy of GENERAL MOTORS COMPANY

    Counter Drive Gear Retaining Ring (1) - Remove and DISCARD

  47. Using the J-22888-20A  Universal Two Jaw Puller (3), remove the reverse counter gear (2).
  48. GM5898578Courtesy of GENERAL MOTORS COMPANY

    5th Gear Retaining Ring (1) - Remove and DISCARD

  49. 5th Gear Thrust Washer (2) - Remove
  50. 5th Gear (3) - Remove
  51. 5th Gear Bearing (4) - Remove
  52. 5th Gear Bearing Spacer (5) - Remove
  53. GM2397555Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the remover tools are aligned level to pull the gear evenly off the shaft.

    Setup the following tools:

    • GE-8433  Universal Bridge Puller (2)
    • DT-39431-3  Fifth Gear Puller Adapter Bolts (3)
    • DT-39431-A  5th and 6th Driven Gear Puller (4)
  54. 5th Gear (1) - Remove
  55. GM5898613Courtesy of GENERAL MOTORS COMPANY

    5th and 6th Gear Synchronizer Hub Retaining Ring- Small (5) - Remove and DISCARD

  56. Remove the following 5th and 6th synchronizer components (1):
    • 5th gear synchronizer inner cone
    • 5th gear synchronizer outer cone
    • 5th Gear Blocking Ring
  57. 5th and 6th Shift Fork (2) - Remove
  58. 5th and 6th Gear Synchronizer Sleeve (4) - Remove
  59. 5th and 6th Gear Synchronizer Insert (3) - Remove [3x]
  60. GM2102210Courtesy of GENERAL MOTORS COMPANY

    Using the DT-49139  Hub Puller Adapter (2) and GE-6125-1B  Slide Hammer with Adapter (1), remove the 5th and 6th synchronizer hub (3).

  61. GM5898614Courtesy of GENERAL MOTORS COMPANY

    Remove the following 6th gear blocking ring components (1):

    • The 6th gear blocking ring.
    • The 6th gear synchronizer outer cone.
    • The 6th gear synchronizer inner cone
  62. GM1887546Courtesy of GENERAL MOTORS COMPANY

    5th and 6th Gear Synchronizer Hub Retaining Ring- Large (1) - Remove and DISCARD

  63. 6th Gear (2) - Remove
  64. 6th Gear Bearing (3) - Remove
  65. 6th Counter Gear Spacer (4) - Remove
  66. 6th Gear Thrust Washer (5) - Remove
  67. GM2102214Courtesy of GENERAL MOTORS COMPANY
  68. Remove and DISCARD 9 of the 11 clutch housing adapter bolts (1) from the transmission case.
  69. Rotate the transmission into the vertical position.
  70. GM2397566Courtesy of GENERAL MOTORS COMPANY

    Shift Shaft Interlock Pin (2) - Remove and DISCARD [2x]

  71. Remove and DISCARD the last 2 clutch housing adapter bolts (1).
  72. GM2397571Courtesy of GENERAL MOTORS COMPANY

    Transmission Magnet (1) - Remove

  73. GM4215566Courtesy of GENERAL MOTORS COMPANY

    Drive out the 1st and 2nd shift fork pin and DISCARD (3).

  74. Remove the transmission case (1) and the offset shift lever (2) together as follows:
    1. Slide the transmission case (1) up and off of the gear clusters and the shift shaft components.
    2. Hold the select control lever (2) against the guide plate in order to prevent the release of the detent ball and the spring.
    3. Remove the offset shift lever (2) from the transmission case.
  75. Clutch Housing Gasket (4) - Remove and DISCARD
  76. GM5898615Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Pump Inlet Pipe (1) - Remove

  77. Transmission Fluid Pump Inlet Pipe Seal (2) - Remove and DISCARD
  78. GM2397585Courtesy of GENERAL MOTORS COMPANY

    Pull up on the 3rd and 4th shift fork (2) and rotate the 5th and 6th and the reverse shift shaft levers (1) off the shift interlock plate.

  79. 5th and 6th and Reverse Shift Shaft (1) - Remove
  80. GM2397588Courtesy of GENERAL MOTORS COMPANY

    Lift up the main shaft (2) enough in order to remove the counter gear (1).

  81. GM2397590Courtesy of GENERAL MOTORS COMPANY

    Remove the main shaft (1) and the shift shaft components (2) as an assembly.

  82. Remove the shift shaft (2) from the main shaft (1).
  83. GM5898616Courtesy of GENERAL MOTORS COMPANY

    Remove the 4th gear blocking ring, which includes the following components (2):

    • 4th Gear Blocking Ring
    • 4th Gear Synchronizer Outer Cone
    • 4th Gear Synchronizer Inner Cone
  84. Input Shaft (1) - Remove
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