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Home >> Cadillac >> 2018 >> CTS V >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 8L45 (M5N) Or 8L90 (M5U) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Control Valve Body Replacement >> Removal Procedure

Removal Procedure

  1. Fig 1: Exploded View Of Transmission Fluid Pan, Filter, Filter Seal, Gasket And Bolts (With Tightening Sequence)
    GM3794350Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission fluid filter (4). Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (Rear Wheel Drive) Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (All Wheel Drive) 

  2. GM3816731Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the 2 transmission fluid baffle bolts, then remove the fluid baffle from the transmission. Transmission Fluid Baffle Replacement 

  3. GM3816771Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission control wiring harness (4). Transmission Control Wiring Harness Replacement (M5U) 

  4. GM3816495Courtesy of GENERAL MOTORS COMPANY

    Remove the manual shaft detent lever spring retaining bolt (1) and the manual shaft detent lever spring (2).

  5. GM3816802Courtesy of GENERAL MOTORS COMPANY

    Pull back the spring (2), then disconnect the manual valve (1) from the manual shift shaft position switch assembly linkage (3).

  6. GM3817155Courtesy of GENERAL MOTORS COMPANY

    Using a suitable pry tool, unlock the retainer (2).

  7. 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 .
  8. GM3816858Courtesy of GENERAL MOTORS COMPANY

    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.