Low and Reverse Band Servo Piston Pin Check

Tools Required

• J 21370-10  Band Apply Pin Gage. See Special Tools .
• J 38737  Band Apply Pin Checking Tool. See Special Tools .

Fig 1: Installing J 21370-10 Into Low And Reverse Band Servo Pin Bore
Courtesy of GENERAL MOTORS CORP.
1. Install the J 21370-10  into the low and reverse band servo pin bore. See Special Tools .
2. Position the J 38737  over the low and reverse band servo bore with the hex hub facing the parking pawl linkage. See Special Tools .
NOTE: Refer to Fastener Notice.
3. Fasten the J 38737  to the case with two low and reverse band servo cover bolts (61). See Special Tools .

   Tighten:  Tighten the bolts to 24 N.m (18 lb ft).

4. Verify that the J 21370-10  moves freely in the J 38737  and in the low and reverse band servo pin bore. See Special Tools .
5. In order to determine the correct low and reverse band servo piston pin length, tighten the hex hub of the J 38737  . See Special Tools .

   Tighten:  Tighten the hex hub of the J 38737  to 34 N. See Special Tools .m (25 lb ft).

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