GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 DeVille 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Lower Control Valve Body and Transmission Fluid Pressure Switch Install

Tools Required

    • DT-47707-R1 IMS Alignment Tool
    • J 39630-1 Lower Control/Valve Body Gasket Guide Pins
    • J 39630-2 Lower Control/Valve Body Gasket Guide Pins
    • J 43708-1 Internal Mode Switch Alignment Tool

    Object Number: 509693 Size: SH
  1. Install the lower control valve body (903) over the J 39630-2 .

    2. 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.

  2. Position the solenoid valve fluid filter retainer (981) onto the lower control valve body (903) and install some of the valve body bolts (938, 940, 941) and hand tighten them.
  3. Remove the J 39630-2 .

    4. Tighten
    Tighten the bolts (938, 940, 941) in a star pattern to 8-14 N·m (6-10 lb ft).


    Object Number: 509703 Size: SH
  4. Position the J 43708-1 or DT-47707-R1 onto the lower control valve body, next to the 2-3 shift solenoid valve, and install the two J 39630-1 .

    5. Important: 

    1. In some cases when replacing the Internal Mode Switch (IMS) it may be necessary to use DT-47707-R1 Alignment Tool instead of J 43708-1 .
    2. Hold the IMS (942) against the J 43708-1 or DT-47707-R1 while tightening the bolts.

  5. Locate the internal mode switch (IMS) (942) against the J 43708-1 or DT-47707-R1 and install the three 8 mm bolts (939).

    6. Tighten
    Tighten the bolts (939) to 8-14 N·m (6-19 lb ft).

  6. Remove the J 43708-1 or DT-47707-R1 and the J 39630-1 .

    7. Object Number: 509634 Size: SH
  7. Install the automatic transmission fluid pressure (TFP) manual valve position switch (936) onto the lower control valve body (903).
  8. Install the remaining bolts (941) into the TFP manual valve position switch (936) and into the lower control valve body (903).

    9. Tighten
    Tighten the bolts (941) to 8-14 N·m (6-19 lb ft).


    Object Number: 533802 Size: SH
  9. Connect the lower control valve body wire harness (943) to the following parts:
    10. • 1-2 shift solenoid valve (909)
    • 2-3 shift solenoid valve (910)
    • Transmission fluid pressure (TFP) manual valve position switch assembly (936)
    • Internal mode switch (IMS) (942)