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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 >> Control Valve Body 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.
    Fig 1: Transmission Fluid Pan, Filter, Filter Seal, Gasket And Bolts (With Tightening Sequence)
    GM3794350Courtesy of GENERAL MOTORS COMPANY
  1. Remove the transmission fluid filter (4). Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement 
  2. Fig 2: Transmission Fluid Baffle And Bolts
    GM3816731Courtesy of GENERAL MOTORS COMPANY
  3. Remove and DISCARD the 2 transmission fluid baffle bolts, then remove the fluid baffle from the transmission. Refer to Transmission Fluid Baffle Replacement 
  4. Fig 3: Transmission Control Wiring Harness And Connectors
    GM3816771Courtesy of GENERAL MOTORS COMPANY
  5. Remove the transmission control wiring harness (4). Refer to Transmission Control Wiring Harness Replacement 
  6. Fig 4: Manual Shaft Detent Lever Spring And Retaining Bolt
    GM3816495Courtesy of GENERAL MOTORS COMPANY
  7. Remove the manual shaft detent lever spring retaining bolt (1) and the manual shaft detent lever spring (2).
  8. Fig 5: Manual Valve, Manual Shift Shaft Position Switch Assembly Linkage And Spring
    GM3816802Courtesy of GENERAL MOTORS COMPANY
  9. Pull back the spring (2), then disconnect the manual valve (1) from the manual shift shaft position switch assembly linkage (3).
  10. Fig 6: Retainer And Transmission Fluid Pump Driven Sprocket
    GM3817155Courtesy of GENERAL MOTORS COMPANY
  11. Using a suitable pry tool, unlock the retainer (2).
  12. Remove the transmission fluid pump driven sprocket (1). Refer to transmission fluid baffle and driven sprocket in Control Valve Assembly and Transmission Wiring Harness Removal .
  13. Fig 7: Valve Body Torx Plus Bolts And Valve Body Assembly
    GM3816858Courtesy of GENERAL MOTORS COMPANY
  14. Using DT-48285  Valve Body Torx Plus Socket remove the 11 valve body bolts (1, 2) and the valve body assembly (3) from the transmission.