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Checking Servo Pin Length

  1. Remove 4th apply piston and return spring. See Fig 1 . Remove retainer ring, washer, apply pin spring and 2nd apply piston pin. Install Piston Compressor (J-22269-01) on 2nd apply piston. See Fig 2 .
  2. Remove retainer ring, cushion spring and spring retainer. Install Band Apply Pin Tool (J-33037) and apply pin. See Fig 3 . Apply 100 INCH lbs. (11 N.m) torque. Note White line on band apply tool.
  3. White line should appear within gauge slot if pin length is correct. If White line does not appear, inspect 2-4 band and reverse input drum for wear and damage during disassembly.
  4. Servo pin length must be checked during reassembly. Servo pin is preset and must not be readjusted. See SERVO PIN SPECIFICATIONS  under 2-4 BAND & SERVO ASSEMBLY  under TRANSMISSION REASSEMBLY.
Fig 1: Exploded View of 2-4 Servo Assembly
G92A12575Courtesy of GENERAL MOTORS CORP.
Fig 2: Compressing 2nd Apply Piston
G92B12576Courtesy of GENERAL MOTORS CORP.
Fig 3: Measuring Servo Pin Length
G92C12577Courtesy of GENERAL MOTORS CORP.