AUT 218W - Automatic Electronic Transmission Service

Credits: 8

Studies passenger car and light truck automatic transmission terminology, operation, and diagnosis. Develops skills in diagnosis, adjustment, and repair of passenger car and light truck rear wheel drive and front wheel drive automatic transmissions. Credit may be earned in AUT 122 or AUT 218 but not in both.

Prerequisite(s): AUT 112W and AUT 212W each with a minimum grade of “C” (2.0)
Corequisite(s): AUT 216
Lecture Hours: 80 Lab Hours: 100
Meets MTA Requirement: None
Pass/NoCredit: No

Outcomes and Objectives 1. Diagnose general transmission and transaxle. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed
below.

A. Identify and interpret transmission/transaxle concern; assure proper engine operation; determine necessary action. P-1

B. Research applicable vehicle and service information, such as transmission/transaxle system operation, vehicle service history, service
precautions, and technical service bulletins. P-1

C. Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals). P-1

D. Diagnose fluid usage, level, and condition concerns; determine necessary action. P-1

E. Perform pressure tests; determine necessary action. P-1

F. Perform stall test; determine necessary action. P-2

G. Perform lock-up converter system tests; determine necessary action. P-1

H. Diagnose electronic, mechanical, hydraulic, vacuum control system concerns; determine necessary action. P-1

I. Diagnose noise and vibration concerns; determine necessary action. P-2

     J.           Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.P-1
2.    Adjust and perform maintenance on transmission and transaxle. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3
       NATEF tasks as listed below.

A. 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

     B.          Service transmission; perform visual inspection; replace fluids and filters. P-1
3.    Repair in-vehicle transmission and transaxle. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed
       below.
     A.          Inspect, adjust or replace (as applicable) vacuum modulator; inspect and repair or replace lines and hoses.   P-3

B. Inspect, repair, and replace governor assembly P-3

C. Inspect and replace external seals and gaskets. P-2

D. Inspect extension housing, bushings and seals; perform necessary action. P-3

E. Inspect, leak test, flush, and replace cooler, lines, and fittings. P-2

F. Inspect and replace speedometer drive gear, driven gear, vehicle speed sensor (VSS), and retainers. P-2

G. Diagnose electronic transmission control systems using a scan tool; determine necessary action. P-1

H. Inspect, replace, and align powertrain mounts. P-2

4. Repair of off-vehicle transmission and transaxle (removal, disassembly, and reinstallation). Complete 95% of Priority 1, 80% of Priority
2, and 50% of Priority 3 NATEF tasks as listed below.

A. Remove and reinstall transmission and torque converter (rear-wheel drive). P-2

B. Remove and reinstall transaxle and torque converter assembly. P-1

C. Disassemble, clean, and inspect transmission/transaxle. P-1

D. Inspect, measure, clean, and replace valve body (includes surfaces and bores, springs, valves, sleeves, retainers, brackets, check-balls,
screens, spacers, and gaskets). P-2

E. Inspect servo bore, piston, seals, pin, spring, and retainers; determine necessary action. P-3

F. Inspect accumulator bore, piston, seals, spring, and retainer; determine necessary action. P-3

G. Assemble transmission/transaxle. P-1

5. Repair of off-vehicle transmission and transaxle (oil pump and converter). Complete 95% of Priority 1, 80% of Priority 2, and 50% of
Priority 3 NATEF tasks as listed below.

A. Inspect converter flex plate, attaching parts, pilot, pump drive, and seal areas. P-2

B. Measure torque converter endplay and check for interference; check stator clutch. P-2

C. Inspect, measure, and reseal oil pump assembly and components. P-1

6. Repair of off-vehicle transmission and transaxle (gear train, shafts, bushings)

A. Measure endplay or preload; determine necessary action. P-1

B. Inspect, measure, and replace thrust washers and bearings. P-2

C. Inspect oil delivery seal rings, ring grooves, and sealing surface areas. P-2

D. Inspect bushings; determine necessary action. P-2

E. Inspect and measure planetary gear assembly (includes sun, ring gear, thrust washers, planetary gears, and carrier assembly); determine
necessary action. P-2

F. Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action. P-2

G. Inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action. P-2

H. Inspect, measure, repair, adjust or replace transaxle final drive components. P-2

I. Inspect and reinstall parking pawl, shaft, spring, and retainer; determine necessary action. P-3

7. Repair of off-vehicle transmission and transaxle (friction and reaction units). Complete 95% of Priority 1, 80% of Priority 2, and 50% of
Priority 3 NATEF tasks as listed below.

A. Inspect clutch drum, piston, check-balls, springs, retainers, seals, and friction and pressure plates; determine necessary action. P-2

B. Measure clutch pack clearance; determine necessary action. P-1

C. Air test operation of clutch and servo assemblies. P-1

D. Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, and retainers; replace as needed. P-1

E. Inspect bands and drums; determine necessary action. P-2

8. Write effectively.

A. Practice writing essay unit tests, quizzes.

B. Practice writing service repair orders (concern, cause, correction).

C. Practice writing daily assignments.

D. Practice writing weekly feedback to instructor.