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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Manual Transmission - TREMEC 6-Speed (M3L Mg9)) >> Repair Instructions - Off Vehicle >> Transmission Disassemble (MG9) >> 5th/6th Speed Driven Gear Removal

5th/6th Speed Driven Gear Removal

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Removing 5th/6th Speed Driven Gear
    GM2102209Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If any of the following components are damaged or replaced. (5th Drive Gear, 5th gear blocking rings, 5th/6th gear synchronizer assembly) Then they must ALL be replaced as a set. All parts in the replacement kit must be used.

  1. Using the J-8433  puller (1), J 39431  gear remover (3), and the J 39431-3  adapter bolts (2), remove the 5th/6th speed driven gear.
  2. Fig 2: 5th/6th Shift Fork, Synchronizer Sleeve, Synchronizer Inserts, Speed Drive Gear Synchronizer Blocking Ring, Friction Cone and Inner Cone
    GM1887538Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If any of the following components are damaged or replaced. (5th Drive Gear, 5th gear blocking rings, 5th/6th gear synchronizer assembly) Then they must ALL be replaced as a set. All parts in the replacement kit must be used.

  3. Remove the following components:
    1. The 5th/6th shift fork
    2. The synchronizer sleeve
    3. The synchronizer inserts
    4. The speed drive gear synchronizer blocking ring
    5. The speed drive gear friction cone
    6. The speed drive gear inner cone
  4. Fig 3: Removing Synchronizer Hub Assembly
    GM2102210Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If any of the following components are damaged or replaced. (5th Drive Gear, 5th gear blocking rings, 5th/6th gear synchronizer assembly) Then they must ALL be replaced as a set. All parts in the replacement kit must be used.

  5. Install the DT-49139  remover (2) between the synchronizer hub assembly and synchronizer blocking ring.
  6. Remove the synchronizer hub assembly with J-6125-1B  slide hammer (1).
  7. Fig 4: Speed Drive Gear Synchronizer Blocking Ring, Gear Friction Cone And Gear Inner Cone
    GM1887543Courtesy of GENERAL MOTORS COMPANY
  8. Remove the following components:
    1. The speed drive gear synchronizer blocking ring
    2. The speed drive gear friction cone
    3. The speed drive gear inner cone
  9. Fig 5: 6th Driven Gear, Caged Needle Bearing And Spacers
    GM1887546Courtesy of GENERAL MOTORS COMPANY
  10. Remove the 6th driven gear, caged needle bearing, and 2 spacers.