Reaction Internal Gear & Input Carrier Assembly: Inspection

1. Check input carrier assembly pinion gears for excessive end play. Using a feeler gauge, measure end play clearance between carrier and pinion gear thrust washer. See Fig 1 . End play should be .009-.027" (.23-.69 mm). Replace carrier if pinion gear clearance is not within specification. Pinion gears are permanently assembled to carrier and are not serviceable.
2. Inspect reaction internal gear and input carrier assembly for excessive wear or damage. Inspect condition of pinion gears, washers and bearings. Clean all parts and dry with compressed air.

Fig 1: Measuring Pinion Gear Clearance (Input Carrier Shown; Reaction Carrier Is Similar)

Courtesy of GENERAL MOTORS CORP.