GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 ION 🢒 Transmission/Transaxle 🢒 Automatic Transmission - VT25-E 🢒 Control Valve Body Replacement

Removal Procedure
  1. Remove the control valve body cover. Refer to Control Valve Body Cover Replacement .

    2. Object Number: 780957 Size: SH
  2. Slide the grey locking clip in order to unlock the connector for the input and output speed sensor assembly.
  3. Press the connector tab and remove the connector for the input and output speed sensor assembly from the control valve body assembly.

    4. Object Number: 780768 Size: SH
  4. Remove the bolt and manual shaft detent assembly from the control valve body assembly.

    5. Object Number: 780958 Size: SH
  5. Disconnect the manual valve link assembly from the manual valve.

    6. Object Number: 781118 Size: SH
  6. Remove the 3 silver bolts from the control valve body assembly.

    7. Object Number: 781120 Size: SH

    Important: Use care when removing the control valve body assembly. The control solenoid valve assembly and the control valve body assembly may separate.

  7. Remove the 15 black bolts from the control valve body assembly.

    8. Object Number: 780769 Size: SH
  8. Remove the control valve body assembly from the transmission case assembly.
  9. Remove the spacer plate assembly. Discard the spacer plate assembly.

Installation Procedure

    Object Number: 780769 Size: SH
  1. Install a NEW spacer plate assembly on the transmission case assembly.
  2. Install the control valve body assembly on the transmission case assembly.

    3. Object Number: 781118 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Secure the control valve body assembly to the transmission case assembly with the 3 silver bolts.

    4. Tighten
    Tighten the 3 silver bolts to 8 N·m (6 lb ft) in the sequence shown.


    Object Number: 781120 Size: SH
  4. Secure the control valve body assembly to the transmission case assembly with the 15 black bolts.

    5. Tighten
    Tighten the 15 black bolts in three separate steps in the sequence shown.

    4.1. Tighten to 5 N·m (4 lb ft)
    4.2. Tighten to 10 N·m (7 lb ft)
    4.3. Tighten to 15 N·m (11 lb ft)

    Object Number: 780958 Size: SH

    Important: Note the orientation of the manual valve before connecting the manual valve link assembly.

  5. Connect the manual valve link assembly to the manual valve.

    6. Object Number: 780768 Size: SH
  6. Install the manual shaft detent assembly and bolt on the control valve body assembly.

    7. Tighten
    Tighten the bolt to 11 N·m (8 lb ft).


    Object Number: 781362 Size: SH
  7. Connect the connector for the input and output speed sensor assembly to the control valve body assembly.
  8. Slide the grey locking clip in order to lock the connector in place.
  9. Install the control valve body cover. Refer to Control Valve Body Cover Replacement .