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Home >> Buick >> 2004 >> Century Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - 4T65-E (Introduction) >> Repair Instructions >> Control Valve Body Replacement >> Removal Procedure
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Removal Procedure

  1. Remove the case side cover. Refer to Case Side Cover Replacement .
  2. Remove the oil pump. Refer to Oil Pump Replacement .
    3. Fig 1: Identifying Valve Body Bolts
    GM164796Courtesy of GENERAL MOTORS CORP.
  3. Remove the valve body bolts (374-381,384).
    4. Fig 2: View Of Valve Body And Spacer Plate & Gasket Assembly
    GM768829Courtesy of GENERAL MOTORS CORP.
  4. Remove the valve body (300) while keeping the spacer plate and gasket assembly (396) with the transaxle.
    5. Fig 3: Locating Ball Check Valves In Valve Body
    GM49399Courtesy of GENERAL MOTORS CORP.
  5. Remove the ball check valves (372 and 373) from the valve body.
    6. Fig 4: View Of Spacer Plate & Gasket Assembly
    GM768830Courtesy of GENERAL MOTORS CORP.
  6. Remove the spacer plate and gasket assembly (396).
    7. Fig 5: Locating Ball Check Valves In Case Cover
    GM48229Courtesy of GENERAL MOTORS CORP.
  7. Remove the ball check valves (372) from the case cover.
    8. Fig 6: Inspecting Valves For Excessive Peening
    GM12988Courtesy of GENERAL MOTORS CORP.
  8. Inspect each check valve seat in the spacer plate (370) for excessive peening. Place a ball check valve (372) on each seat and use a flashlight in order to look for visible light between the valve and the seat.
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