GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Sunfire 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E/4T45-E 🢒 Low/Reverse Servo Assembly Replacement

Removal Procedure
  1. Remove the oil feed pipes. Refer to Oil Feed Pipes Replacement.

    2. Object Number: 588858 Size: SH
  2. Remove the 3 low and reverse band servo cover bolts, the servo and the spring.
  3. Disassemble, clean and inspect the low and reverse servo assembly. Refer to Low and Reverse Servo Disassemble in Automatic Transaxle 4T40-E/4T45-E Unit Repair.

Installation Procedure
  1. Assemble the low and reverse servo. Refer to Low and Reverse Servo Assemble and Installation in Automatic Transaxle 4T40-E/4T45-E Unit Repair.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 588858 Size: SH
  2. Install the lo and the reverse band servo cover bolts.

    3. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  3. Install the oil feed pipe. Refer to Oil Feed Pipes Replacement .

    4. 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.

  4. Reset the TAP values. Refer to Adapt Function.