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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 10L80 (MF6) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement (Rear Wheel Drive) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Cadillac Escalade ESV, and 2018 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Battery Negative Cable Disconnection and Connection (Dual Battery)Battery Negative Cable Disconnection and Connection (Single Battery)
  2. Raise and suitably support the vehicle. Lifting and Jacking the Vehicle
  3. Support the transmission with a transmission jack.
  4. Remove the transmission support crossmember. Transmission Support Crossmember Replacement (2 WD)Transmission Support Crossmember Replacement (4 WD)
  5. Remove the transmission mount. Transmission Mount Replacement (Two Wheel Drive)Transmission Mount Replacement (Four Wheel Drive)
  6. Remove the catalytic converter. Three-Way Catalytic Converter Replacement
    7. Fig 1: Torque Converter Access Plug
    GM3789685Courtesy of GENERAL MOTORS COMPANY
  7. Remove the torque converter access plug (1).
    8. Fig 2: Flywheel Inspection Cover Bolt And Cover
    GM3792966Courtesy of GENERAL MOTORS COMPANY
  8. Remove the left flywheel inspection cover bolt (1) and cover (2).
  9. Remove the starter motor. Starter Replacement (L83, L86)
    10. Fig 3: Flywheel Inspection Cover Bolt And Cover
    GM3793350Courtesy of GENERAL MOTORS COMPANY
  10. Remove the right flywheel inspection cover bolt (1) and cover (2).
    11. Fig 4: Torque Converter Bolts
    GM4754922Courtesy of GENERAL MOTORS COMPANY
  11. Remove the flywheel to torque converter bolts (1).
  12. Disconnect the vent tube hoses and the electrical connections from the transfer case.
    13. Fig 5: Transmission Vent Hose Assembly, Clip Bracket And Retaining Nut
    GM4751424Courtesy of GENERAL MOTORS COMPANY
  13. Remove the vent tube bracket (3) from the transmission. Transmission Vent Hose Clip Bracket Replacement 
  14. Remove the rear propeller shaft. Rear Propeller Shaft Replacement (1500)Rear Propeller Shaft Replacement (Heavy Duty)Rear Propeller Shaft Replacement (M5U, 2WD)
    15. Fig 6: Fuel Line Bracket And Bolt
    GM4754893Courtesy of GENERAL MOTORS COMPANY
  15. Remove the bolt (1) that secures the fuel line bracket to the left side of the transmission.
  16. Remove the range selector cable retaining clip from the transmission range selector cable.
    17. Fig 7: Range Selector Lever Retaining Nut And Range Selector Cable
    GM4754173Courtesy of GENERAL MOTORS COMPANY
  17. Remove the range selector cable lever nut (1). Automatic Transmission Range Selector Lever Cable Lever Replacement 
    18. NOTE:

    Do Not remove the cable end from the range selector cable lever, if removed, the cable will break and will have to be replaced.

  18. Remove the shift cable and range selector cable lever (2) from the transmission as an assembly.
  19. Disconnect the transmission electrical connector from the transmission.
  20. Remove the wire harness from the transmission.
    21. Fig 8: Oil Cooler Lines
    GM3712021Courtesy of GENERAL MOTORS COMPANY
  21. Disconnect the transmission oil cooler lines (2) from the transmission. Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (L83 MYC)Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (L86 M5U)
  22. Plug the transmission oil cooler line connectors in the transmission case.
  23. Lower the transmission to gain access to the top and sides of the transmission.
    24. Fig 9: Fuel Feed Line Bracket Retaining Nut
    GM4754941Courtesy of GENERAL MOTORS COMPANY
  24. Remove the fuel feed line bracket retaining nut (1).
    25. Fig 10: 6 Upper Bolts Securing Transmission To Engine
    GM3789821Courtesy of GENERAL MOTORS COMPANY
  25. Remove the 6 upper bolts (1) securing the transmission to the engine.
    26. Fig 11: Bolts Securing Transmission To Engine
    GM3792155Courtesy of GENERAL MOTORS COMPANY
  26. Remove the 2 lower bolts (1) securing the transmission to the engine.
  27. Pull the transmission straight back.
  28. Install the J 21366  converter holding strap onto the transmission bell housing to retain the torque converter.
  29. Remove the transmission from the vehicle.
  30. Flush and flow test the transmission oil cooler and lines. Transmission Fluid Cooler Flow Test and Flushing (10L80)
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