GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Century 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Transmission Fluid Pressure Manual Valve Position Switch Replacement

Removal Procedure
  1. Remove the case side cover. Refer to Control Valve Body Cover Replacement .
  2. Disconnect the transaxle wiring harness.

    3. Object Number: 48220 Size: SH
  3. Remove the control valve body bolts (375, 379 and 381) that mount the fluid pressure manual valve position switch to the control valve body (300).

    4. Important: When removing the 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: Refer to Fastener Notice in the Preface section.

  2. Install the control valve body bolts (375, 379 and 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 11 N·m (97 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 ECM, PCM or 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 Adapt Function .