Off-Vehicle Transmission and Transaxle Repair
Measure, air-test, and replace soft parts
Off-vehicle repair requires disassembly discipline: tag parts, keep clean, and inspect clutch plates, steels, seals, bushings, bearings, pump, valve body, and torque converter. Measure clutch pack clearance, end play, and bushing fit. Air-test clutch packs and servos before final assembly; a lip seal installed backward or a missing check ball causes a comeback. Replace all seals, gaskets, and suspect soft parts; do not reuse a converter from a failed unit without flushing or replacing it.
Assembly and precheck
Lubricate seals, seat the converter fully, align the pump, and follow torque and snap-ring selection specs. Check converter seating depth before mating the unit. After installation, verify fluid level and perform relearn.
Traps: reusing seals; missing check balls; incorrect snap-ring thickness; wrong lip-seal direction; not measuring end play; skipping cooler flush. Rule of thumb: every clutch pack gets a clearance measurement and an air test. Worked example: clutch clearance is 0.060 in. with a spec of 0.020–0.040 in.; select a thicker pressure plate or snap ring to bring it into range rather than forcing assembly.