AMT 50 Tasks

Automatic Transmission and Transaxle

For every task in Automatic Transmission and Transaxle, the following safety requirement must be strictly enforced:

Comply with personal and environmental safety practices associated with clothing; eye protection; hand tools; power equipment; proper ventilation; and the handling, storage, and disposal of chemicals/materials in accordance with local, state, and federal safety and environmental regulations.

II. Automatic Transmission and Transaxle

A. General Transmission and Transaxle Diagnosis

1. Complete work order to include customer information, vehicle identifying information, customer concern, related service history, cause, and correction. P-1
2. Identify and interpret transmission/transaxle concern; assure proper engine operation; determine necessary action. P-1
3. Research applicable vehicle and service information, such as transmission/transaxle system operation, fluid type, vehicle service history, service precautions, and technical service bulletins. P-1
4. Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals). P-1
5. Diagnose fluid loss and condition concerns; check fluid level on transmission with and without dip-stick; determine necessary action. P-1
6. Perform pressure tests; determine necessary action. P-1
7. Perform stall test; determine necessary action. P-3
8. Perform lock-up converter system tests; determine necessary action. P-1
9. Diagnose mechanical and vacuum control system concerns; determine necessary action. P-2
10. Diagnose noise and vibration concerns; determine necessary action. P-2
11. Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles. P-1
12. Diagnose pressure concerns in the transmission using hydraulic principles (Pascal's Law). P-2
13. Diagnose electrical/electronical concerns using principals of electricity (Ohm's Law). P-2

II. Automatic Transmission and Transaxle

B. Transmission and Transaxle Maintenance and Adjustment

1. Inspect, adjust or replace throttle valve (TV) linkages or cables; manual shift linkages or cables; transmission range sensor; check gear select indicator (as applicable). P-1
2. Service transmission; perform visual inspection; replace fluids and filters. P-1

II. Automatic Transmission and Transaxle

C. In-Vehicle Transmission and Transaxle Repair

1. Inspect, adjust or replace (as applicable) vacuum modulator; inspect and repair or replace lines and hoses. P-3
2. Inspect, repair, and replace governor assembly. P-3
3. Inspect and replace external seals and gaskets. P-2
4. Inspect extension housing, bushings and seals; perform necessary action. P-3
5. Inspect and replace speedometer drive gear, driven gear, vehicle speed sensor (VSS), and retainers. P-2
6. Diagnose electronic transmission control systems using a scan tool; determine necessary action. P-1
7. Inspect, replace, and align powertrain mounts. P-2

II. Automatic Transmission and Transaxle

D. Off-Vehicle Transmission and Transaxle Repair

1. Removal, Disassembly, and Reinstallation

1. Remove and reinstall transmission and torque converter (rear-wheel drive). P-2
2. Remove and reinstall transaxle and torque converter assembly. P-1
3. Disassemble, clean, and inspect transmission/transaxle. P-1
4. Inspect, measure, clean, and replace valve body (includes surfaces, bores, springs, valves, sleeves, retainers, brackets, check-balls, screens, spacers, and gaskets). P-2
5. Inspect servo bore, piston, seals, pin, spring, and retainers; determine necessary action. P-3
6. Inspect accumulator bore, piston, seals, spring, and retainer; determine necessary action. P-3
7. Assemble transmission/transaxle. P-1
8. Inspect, test, and flush cooler, lines, and fittings. P-1

2. Oil Pump and Converter

1. Inspect converter flex plate, attaching parts, pilot, pump drive, and seal areas. P-2
2. Measure torque converter endplay and check for interference; check stator clutch. P-2
3. Inspect, measure, and reseal oil pump assembly and components. P-1

3. Gear Train, Shafts, Bushings and Case

1. Measure endplay or preload; determine necessary action. P-1
2. Inspect, measure, and replace thrust washers and bearings. P-2
3. Inspect oil delivery seal rings, ring grooves, and sealing surface areas. P-2
4. Inspect bushings; determine necessary action. P-2
5. Inspect and measure planetary gear assembly (includes sun, ring gear, thrust washers, planetary gears, and carrier assembly); determine necessary action. P-2
6. Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action. P-2
7. Inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action. P-2
8. Inspect, measure, repair, adjust or replace transaxle final drive components. P-2
9. Inspect and reinstall parking pawl, shaft, spring, and retainer; determine necessary action. P-3

4. Friction and Reaction Units

1. Inspect clutch drum, piston, check-balls, springs, retainers, seals, and friction and pressure plates; determine necessary action. P-2
2. Measure clutch pack clearance; determine necessary action. P-1
3. Air test the operation of clutch and servo assemblies. P-1
4. Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, and retainers; determine necessary action. P-1
5. Inspect bands and drums; determine necessary action. P-2