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Home >> Chevrolet >> 2007 >> Optra LS, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - ZF 4HP 16 - Specifications, Component Locations And Repairs >> Repair Instructions >> Control Valve Body Replacement >> Removal Procedure

Removal Procedure

    Fig 1: View Of Transaxle Wiring Harness And PNP Switch Connector
    GM1290953Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution .
  1. Disconnect the negative battery cable.
  2. Disconnect the transaxle wiring harness and disconnect the electrical connector from the park/neutral position (PNP) switch.
    3. Fig 2: Identifying Transaxle Fluid Drain Plug And DT 46475
    GM1255915Courtesy of GENERAL MOTORS CORP.
  3. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking Notice .
  4. Remove the engine cover. Refer to Engine Cover Replacement .
  5. Using DT 46475  (1), remove the transaxle fluid drain plug. See Special Tools . Drain the transaxle fluid.
    6. Fig 3: Identifying Valve Body Mounting Bolts
    GM1255959Courtesy of GENERAL MOTORS CORP.
  6. Remove the oil pan and the oil pan gasket. Refer to Automatic Transmission Fluid Pan and Gasket Removal .
  7. Remove the valve body mounting bolts.
  8. Remove the mounting bolt from the A/T input speed sensor.
    9. Fig 4: View Of A/T Output Speed Sensor And Mounting Bolts
    GM1255960Courtesy of GENERAL MOTORS CORP.
  9. Remove the mounting bolts from the A/T output speed sensor.
    10. Fig 5: View Of Control Valve Body
    GM1255962Courtesy of GENERAL MOTORS CORP.
  10. Remove the control valve body.
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