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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 Assemble >> Special Tools

Special Tools

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Equivalent regional tools: Special Tools

  1. Lubricate all components as assembly progresses, using DT-36850-A  Transjel® Lubricant Assembly Lube.
  2. GM5898616Courtesy of GENERAL MOTORS COMPANY

    Input Shaft (1) - Install

    3. NOTE:
    • Ensure the tabs on the blocking ring align with the corresponding pockets in the synchronizer hub. Click video link above for reference.
    • Ensure the rings are assembled concentric to the centerline of the input shaft, this will aid in the output shaft installation into the pocket of the input shaft.
  3. Install the 4th gear blocking ring (2):
    • 4th Gear Synchronizer Inner Cone
    • 4th Gear Synchronizer Outer Cone
    • 4th Gear Blocking Ring
  4. GM2397590Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    In order for the shift forks to properly line up with the synchronizers, the shift shaft assembly must be assembled correctly. Shift Shaft and Fork Assemblies Assemble 

    Assemble the shift shaft (2) to the main shaft (1).

  5. Install the main shaft (1) and the shift shaft (2) into the clutch housing.
  6. GM2397588Courtesy of GENERAL MOTORS COMPANY

    Install the counter gear (1) using the following sequence:

    1. Lift up the main shaft (2) enough in order to install the counter gear (1).
    2. Install the counter gear (1).
    3. Lift the main shaft (2) enough in order to rotate the input shaft to engage the synchronizer keys with 4th gear blocking ring.
  7. GM2397585Courtesy of GENERAL MOTORS COMPANY

    5th and 6th and Reverse Shift Shaft (1) - Install

  8. Align the slots of the shift shaft levers (1, 2) with the interlock plate.
  9. GM5898615Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Pump Inlet Pipe Seal (2) - Install NEW

  10. Transmission Fluid Pump Inlet Pipe (1) - Install
  11. GM4215566Courtesy of GENERAL MOTORS COMPANY

    Clutch Housing Gasket (4) - Install NEW

  12. Do the following in order to install the transmission case and the select control lever assembly:
    1. Shift the transmission into NEUTRAL in order to keep the 3rd and 4th shift shaft from engaging.
    2. Install the select control lever (2), through the transmission case opening, while sliding the transmission case (1) onto the gear clusters and the shift rail components.
    3. Install a NEW 1st and 2nd shift fork pin (3).
  13. GM2397571Courtesy of GENERAL MOTORS COMPANY

    Apply adhesive to the transmission magnet (1), then install into the transmission case. Adhesives, Fluids, Lubricants, and Sealers

  14. GM2102304Courtesy 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.
    15. CAUTION:

    Refer to Fastener Caution .

    NOTE:

    In order to align the shift interlock plate slot with the shift lever guide bolt holes, pull up on the 5th/6th and reverse shift rail assembly while installing the shift lever guide bolts.

  15. Install the 2 shift shaft interlock pin (1) while pulling up on 5th and 6th and reverse shift rail assembly. Tighten the shift shaft interlock pin (1). Fastener Specifications
  16. GM2102214Courtesy 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.
  17. Clutch Housing Adapter Bolt - Install NEW and tighten [11x] - Fastener Specifications
  18. Install the clutch actuator cylinder.
  19. GM1887546Courtesy of GENERAL MOTORS COMPANY

    6th Gear Thrust Washer (5) - Install

  20. 6th Counter Gear Spacer (4) - Install
  21. 6th Gear (2) - Install
  22. 6th Gear Bearing (3) - Install
  23. 5th and 6th Gear Synchronizer Hub Retaining Ring- Large (1) - Install NEW
  24. GM5898614Courtesy of GENERAL MOTORS COMPANY

    Install 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
  25. GM2178188Courtesy of GENERAL MOTORS COMPANY

    Using the DT-38205-1  Installer (1), install the 5th and 6th synchronizer hub (2).

  26. GM5898613Courtesy of GENERAL MOTORS COMPANY

    5th and 6th Gear Synchronizer Insert (3) - Install [3x]

  27. 5th and 6th Shift Fork (2) - Install
  28. 5th and 6th Gear Synchronizer Sleeve (4) - Install
  29. Install the following 5th and 6th synchronizer components (1):
    • 5th gear synchronizer inner cone
    • 5th gear synchronizer outer cone
    • 5th Gear Blocking Ring
  30. 5th and 6th Gear Synchronizer Hub Retaining Ring- Small (5) - Install NEW
  31. GM2397843Courtesy of GENERAL MOTORS COMPANY

    Install the 5th gear (1) by heating (2) to 54°C (130°F). The smaller outside diameter (OD) of the gear faces down.

  32. GM5898578Courtesy of GENERAL MOTORS COMPANY

    5th Gear Bearing Spacer (5) - Install

  33. 5th Gear Bearing (4) - Install
    34. NOTE:

    Align the gear with the raised tabs on the synchronizer to ensure the gear sets flush.

  34. 5th Gear (3) - Install
  35. 5th Gear Thrust Washer (2) - Install
  36. 5th Gear Retaining Ring (1) - Install NEW
  37. GM2397847Courtesy of GENERAL MOTORS COMPANY

    Using the DT-39441-30  5th Gear Installer Adapter (2), install the reverse counter gear (1).

  38. GM1887622Courtesy of GENERAL MOTORS COMPANY

    Counter Drive Gear Retaining Ring (1) - Install NEW

  39. GM2397550Courtesy of GENERAL MOTORS COMPANY

    Install the two piece reverse gear retaining ring (3).

  40. 5th Gear Thrust Washer (2) - Install NEW
    41. NOTE:

    The synchronizer hub for reverse should be assembled with nylon ring side away from the reverse gear.

  41. Install the reverse shift fork, synchronizer and inserts (1).
  42. GM2397549Courtesy of GENERAL MOTORS COMPANY

    Reverse Shift Fork Retaining Ring (1) - Install NEW

  43. Reverse Gear Synchronizer Retainer (2) - Install NEW
  44. GM5898569Courtesy of GENERAL MOTORS COMPANY

    Install the following parts in order:

      NOTE:
      • Ensure the tabs on the blocking ring align with the corresponding pockets in the synchronizer hub. Click video link above for reference.
      • When the blocking ring is installed properly with the pockets lined up with the synchronizer hub, there should be NO gap between the blocking ring and the synchronizer hub assemble.
    1. The reverse gear blocking ring (5), including the following components:
      • Reverse gear synchronizer inner cone
      • Reverse gear synchronizer outer cone
      • Reverse Gear Blocking Ring
  45. Reverse Gear Bearing (4) - Install
  46. Reverse Gear (3) - Install
  47. Reverse Gear Thrust Washer (2) - Install
  48. Main Shaft Bearing Retaining Ring (1) - Install NEW
  49. GM2397547Courtesy of GENERAL MOTORS COMPANY

    Install the following parts in order:

      NOTE:

      Replacement bearings will be shipped as assembly and only the roller bearing section is installed at this point. The Race is installed in the extension housing.

    1. Main Shaft Rear Bearing (2) - Install
    2. Reverse Gear Thrust Washer (3) - Install [2x]
    3. Main Shaft Bearing Retaining Ring (1) - Install NEW
  50. GM2397849Courtesy of GENERAL MOTORS COMPANY

    Install the following parts in order:

    1. Using the DT-38205-1  Installer

      (3), install the vehicle speed sensor reluctor wheel (2).

    2. Install the NEW main shaft bearing retaining ring (1).
  51. GM2397545Courtesy of GENERAL MOTORS COMPANY

    Install the offset shift lever (1).

  52. Install NEW 1st and 2nd shift fork pin (2).
  53. GM2102199Courtesy of GENERAL MOTORS COMPANY

    Lift up on the shift shaft extension while installing the shift shaft detent roller (3) and shift shaft detent spring (2).

  54. 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.
  55. Shift Shaft Detent Plug (1) - Install NEW and tighten - Fastener Specifications .
  56. GM4055396Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Align the 5th and 6th shift shaft to the extension housing bore in order to install the extension housing.

    Transmission Extension Gasket (6) - Install NEW

  57. Transmission Extension (5) - Install
  58. Transmission Fluid Cooler Upper Extension Pipe Clip Bracket (4) - Install
    59. NOTE:

    The cooler line bracket must be installed at an angle of 45 degrees before tightening bolt.

  59. Transmission Fluid Auxiliary Cooler Pipe Bracket (3) - Install
  60. Transmission Extension Nut (2) - Install and tighten [2x] - Fastener Specifications
  61. Transmission Extension Bolt (1) - Install NEW and tighten [6x] - Fastener Specifications
  62. GM4055395Courtesy of GENERAL MOTORS COMPANY

    Shift Fork Position Sensor Magnet (1) - Install

  63. Shift Shaft Detent Lever Bolt (2) - Install and tighten - Fastener Specifications
  64. GM4055394Courtesy of GENERAL MOTORS COMPANY

    Manual Transmission Gear Position Sensor Seal (3) - Install NEW

  65. Manual Transmission Gear Position Sensor (2) - Install
    66. NOTE:

    Only the 4 bolts from the sensor plate should have been removed. If the 2 bolts from the sensor were removed, then the assembly must be replaced.

  66. Manual Transmission Gear Position Sensor Bolt (1) - Install NEW and tighten [4x] - Fastener Specifications
  67. GM4062705Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft Transmission Yoke (1) - Install

  68. GM4055391Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft Transmission Yoke Washer (2) - Install NEW

  69. Propeller Shaft Transmission Yoke Nut (1) - Install NEW
  70. Use the DT-45012  Pinion Flange Holder (4) and tighten the propeller shaft transmission yoke nut (1) to Fastener Specifications .
  71. GM4055388Courtesy of GENERAL MOTORS COMPANY

    Shift Control Shaft Cover Seal (1) - Install NEW

  72. Shift Control Shaft Cover (2) - Install
  73. Shift Control Shaft Cover Bolt (3) - Install NEW and tighten [4x] - Fastener Specifications
  74. GM4055387Courtesy of GENERAL MOTORS COMPANY

    Remove the DT-47678  Transmission Holding Fixture (2) and DT-47678-10  Transmission Holding Fixture Adapter (3) from DT-03289-20  Holding Fixture (1).

  75. Remove the DT-47678  Transmission Holding Fixture (2) and DT-47678-10  Transmission Holding Fixture Adapter (3) from the transmission (4).
  76. Install the transmission. Manual Transmission Removal and Installation
  77. Fill the transmission with transmission fluid. Transmission Fluid Drain and Fill
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