GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Grand Prix 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Transmission Fluid Pressure Manual Valve Position Switch Replacement

Removal Procedure

    Object Number: 48220 Size: SH
  1. Remove the case side cover. Refer to Control Valve Body Cover Replacement .
  2. Disconnect the transaxle wiring harness.
  3. Remove the control valve body bolts (375, 379, 381) that mount the fluid pressure manual valve position switch to the control valve body (300).

    4. Important: When removing the transmission fluid pressure (TFP) switch handle the switch carefully, the fluid pressure manual valve position switch is very delicate.

  4. Carefully remove the fluid pressure manual valve position switch (395).
  5. Inspect the fluid pressure manual valve position switch (395) for the following conditions:
    6. • Damaged electrical connector terminals
    • Damaged seals
    • Damaged switch membranes
    • Debris on the switch membranes

Installation Procedure

    Object Number: 48220 Size: SH

    Important: When installing the TFP switch handle the switch carefully, the fluid pressure manual valve position switch is very delicate.

  1. Carefully install the fluid pressure manual valve position switch (395).

    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. Install the control valve body bolts (375, 379, 381) that mount the fluid pressure manual valve position switch to the control valve body (300).

    3. Tighten

        • Tighten the control valve body bolt (375) to 12 N·m (106 lb in).
        • Tighten the control valve body bolt (379) to 16 N·m (106 lb in).
        • Tighten the control valve body bolt (381) to 8 N·m (70 lb in).
  3. Connect the transaxle wiring harness.
  4. Install the case side cover. Refer to Control Valve Body Cover Replacement .

    5. Important: It is recommended that transmission adaptive pressure (TAP) information be reset.

    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The engine control module (ECM), powertrain control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

  5. Reset the TAP values. Refer to Transmission Adaptive Functions .