GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 21370-10 Band Apply Pin Gauge
    • J 38737 Band Apply Pin Checking Tool

    Object Number: 31240  Size: SH
  1. Install the J 21370-10 into the low and reverse band servo pin bore.
  2. Position the J 38737 over the low and reverse band servo bore with the hex hub facing the parking pawl linkage.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Fasten the J 38737 to the case with 2 low and reverse band servo cover bolts (61).
  5. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).

  6. Verify that the J 21370-10 moves freely in the J 38737 and in the low and reverse band servo pin bore.
  7. Important: The hex hub of the J 38737 must be tightened in order to determine the correct low and reverse band servo piston pin length.

  8. Tighten the hex hub of the J 38737 .
  9. Tighten
    Tighten the hex hub of the J 38737 to 34 N·m (25 lb ft).

  10. Observe the lands on the J 21370-10 in order to determine which land is even with the top edge of the J 38737 . Note the letter (A, B or C) stamped on the J 21370-10 .
  11. Refer to the Low and Reverse Band Servo Piston Pin Specification chart, in the Transmission General Specifications , in order to determine the correct pin length to use.
  12. Remove the tools.