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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 >> Installation Procedure

Installation 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: Valve Body Torx Plus Bolt And Valve Body Assembly (With Tightening Sequence)
    GM3816870Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Before installing the control valve solenoid body onto the transmission, document the 16-digit Part Unique Number (PUN). If the control valve solenoid body PUN has not been saved for reference, it may be necessary to disassemble the control valve solenoid body from the transmission to clearly read the control valve solenoid body PUN.

  1. Using DT-48285  Valve Body Torx Plus Socket install the valve body (3) and the 11 valve body assembly bolts (1, 2) in the transmission.
    2. CAUTION:

    Refer to Fastener Caution .

  2. Tighten the 7 bolts (1 - M6 x 68) and the 4 bolts (2 - M6 x 45) to 9 N.m (80 lb in) in the sequence shown.
    3. Fig 2: Retainer And Transmission Fluid Pump Driven Sprocket
    GM3817155Courtesy of GENERAL MOTORS COMPANY
  3. Using a suitable pry tool, lock the retainer (2).
  4. Install the transmission fluid pump driven sprocket (1). Refer to automatic transmission fluid baffle and driven sprocket in Control Valve Assembly and Transmission Wiring Harness Installation .
    5. Fig 3: Transmission Control Wiring Harness And Connectors
    GM3816771Courtesy of GENERAL MOTORS COMPANY
  5. Install the transmission control wiring harness (4). Refer to Transmission Control Wiring Harness Replacement 
    6. Fig 4: Manual Valve, Manual Shift Shaft Position Switch Assembly Linkage And Spring
    GM3816802Courtesy of GENERAL MOTORS COMPANY
  6. Connect the manual valve (1) to the manual shift shaft position switch assembly linkage (2).
  7. Return the spring (2) to it's correct position.
    8. Fig 5: Manual Shaft Detent Lever Spring And Retaining Bolt
    GM3816495Courtesy of GENERAL MOTORS COMPANY
  8. Install the manual shaft detent lever spring (2) and the manual shaft detent lever spring retaining bolt (1) then tighten to 12 N.m (106 lb in).
    9. Fig 6: Transmission Fluid Baffle And Bolts
    GM3816731Courtesy of GENERAL MOTORS COMPANY
  9. Install the transmission fluid baffle, then install the 2 NEW fluid baffle bolts. Refer to Transmission Fluid Baffle Replacement 
    10. Fig 7: Transmission Fluid Pan, Filter, Filter Seal, Gasket And Bolts (With Tightening Sequence)
    GM3794350Courtesy of GENERAL MOTORS COMPANY
  10. Install the transmission fluid filter (4). Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement 
  11. Reprogram the transmission. Refer to Solenoid Valve Characterization Reprogramming
    12. NOTE:

    The Service Fast Learn procedure must be performed when one of the following repairs have been made to the vehicle. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, as well as transmission DTCs being set:

    The service fast learn procedure must be performed when any of the following repairs has been made to the transmission.

    • Pressure regulating solenoid replacement
    • Valve body repair or replacement
    • Any service/repair in response to a shift quality concern
    • Any internal transmission service, repair, overhaul, or replacement
    • Torque converter replacement
    • TCM replacement
    • Transmission assembly replacement
  12. Perform the service fast learn procedure. Refer to Transmission Service Fast Learn Procedure 
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