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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Overhaul >> Specifications >> Transmission General Specifications >> Low and Reverse Band Servo Piston Pin Specification Chart

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. See Special Tools . 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. See Special Tools .

Fig 1: Low and Reverse Band Servo Piston Pin Specification Chart
GM28391Courtesy of GENERAL MOTORS CORP.
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