GM Service Manual Online
For 1990-2009 cars only

Transmission General Specifications Unit Repair

Specification

Specification

Metric

English

Direct Clutch Piston Travel Specification

1.27-4.369 mm

0.050-0.172 in

Intermediate Clutch Piston Travel Specification

1.02-2.72 mm

0.040-0.107 in

Forward Clutch Piston Travel Specification

1.27-4.369 mm

0.050-0.172 in

Overrun Clutch Piston Travel Specification

0.838-2.38 mm

0.033-0.094 in

Fourth Clutch Piston Travel Specification

1.016-2.540 mm

0.040-0.100 in

Low and Reverse Band Servo Piston Pin Specification Chart

Refer to the chart in order to determine the correct low and reverse band servo pin length to use. A, B and C on the chart refer to markings on the J 21370-10 Band Apply Pin Gauge. Numbers 1-7 match the correct piston pin length to the J 21370-10 land indicated by the low and reverse band servo pin inspection procedure.


Object Number: 28391  Size: SH

Servo Piston Pin Selection

Pin Length

Pin Identification

mm

inch

83.82-83.97

3.300-3.306

1

84.53-84.68

3.328-3.334

2

85.24-85.39

3.356-3.362

3

85.95-86.10

3.384-3.390

4

86.66-87.53

3.412-3.446

5

87.38-87.53

3.440-3.446

6

88.09-88.24

3.468-3.474

7