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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Automatic Transmission - 8L90 (M5U) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Dual Battery)Battery Negative Cable Disconnection and Connection (Single Battery) .
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement (1500)Rear Propeller Shaft Replacement (Heavy Duty)Rear Propeller Shaft Replacement (M5U, 2WD) .
  4. Support the transmission with a transmission jack.
  5. Remove the transmission crossmember. Refer to Transmission Support Crossmember Replacement (2 WD)Transmission Support Crossmember Replacement (4 WD) .
  6. Remove the transmission mount. Refer to Transmission Mount Replacement (Two Wheel Drive)Transmission Mount Replacement (Four Wheel Drive) .
  7. Remove the catalytic converter. Refer to Three-Way Catalytic Converter Replacement .
  8. If the vehicle is equipped with a transfer case, remove the front propeller shaft. Refer to Front Axle Propeller Shaft Replacement (NQH)Front Axle Propeller Shaft Replacement (Heavy Duty) .
    9. Fig 1: Torque Converter Access Plug
    GM3789685Courtesy of GENERAL MOTORS COMPANY
  9. Remove the torque converter access plug (1).
    10. Fig 2: Flywheel Inspection Cover Bolt And Cover
    GM3792966Courtesy of GENERAL MOTORS COMPANY
  10. Remove the left flywheel inspection cover bolt (1) and cover (2).
  11. Remove the starter motor. Refer to Starter Replacement (L83, L86)Starter Replacement (L96) .
    12. Fig 3: Flywheel Inspection Cover Bolt And Cover
    GM3793350Courtesy of GENERAL MOTORS COMPANY
  12. Remove the right flywheel inspection cover bolt (1) and cover (2).
    13. Fig 4: Flywheel To Torque Converter Bolts
    GM1708265Courtesy of GENERAL MOTORS COMPANY
  13. Remove the flywheel to torque converter bolts.
  14. Lower the transmission to gain access to the top and sides of the transmission.
    15. Fig 5: Vent Tube Hoses
    GM3791367Courtesy of GENERAL MOTORS COMPANY
  15. Disconnect the vent tube hoses (2, 4) and the electrical connections from the transfer case, if equipped.
  16. Remove the transfer case, if equipped. Refer to the appropriate procedure:
    17. Fig 6: Transmission Heat Shield And Bolts
    GM3792255Courtesy of GENERAL MOTORS COMPANY
  17. Remove the 3 bolts (1, 2) securing the heat shield to the transmission.
  18. Remove the transmission heat shield (3).
    19. Fig 7: Range Selector Cable And Cable Bracket Retainer
    GM1707190Courtesy of GENERAL MOTORS COMPANY
  19. Remove the range selector cable retaining clip (1) from the transmission range selector cable.
  20. Remove the range selector cable (2) from the range selector lever ball stud and the range selector cable bracket.
  21. Disconnect the transmission electrical connector from the transmission.
  22. Remove the wire harness from the transmission.
    23. Fig 8: Bolt Securing Fuel Line Bracket To Left Side Of Transmission
    GM396800Courtesy of GENERAL MOTORS COMPANY
  23. Remove the bolt that secures the fuel line bracket to the left side of the transmission.
    24. Fig 9: Oil Cooler Lines
    GM3712021Courtesy of GENERAL MOTORS COMPANY
  24. Disconnect the transmission oil cooler lines (2) from the transmission. Refer to Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (L86 M5U) .
  25. Plug the transmission oil cooler line connectors in the transmission case.
    26. Fig 10: 6 Upper Bolts Securing Transmission To Engine
    GM3789821Courtesy of GENERAL MOTORS COMPANY
  26. Remove the 6 upper bolts (1) securing the transmission to the engine.
    27. Fig 11: 2 Lower Bolts Securing Transmission To Engine
    GM3792155Courtesy of GENERAL MOTORS COMPANY
  27. Remove the 2 lower bolts (1) securing the transmission to the engine.
  28. Pull the transmission straight back.
  29. Install the J 21366  converter holding strap onto the transmission bell housing to retain the torque converter.
  30. Remove the transmission from the vehicle.
  31. Flush and flow test the transmission oil cooler and lines. Refer to Transmission Fluid Cooler Flow Test and Flushing (8L90) .
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