natef task area a2 - grafton school district · natef task area a2 automatic transmission &...
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NATEF Task Area A2 Automatic Transmission
• A. General Transmission & Transaxle Diagnosis
• B. Transmission & Transaxle Maintenance & Adjustment
• C. InVehicle Transmission & Transaxle Repair
• D. OffVehicle Transmission & Transaxle Repair
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Complete work order to include customer information, vehicle identifying information, verify customer concern, related service history, cause, & correction.
A2.A.1
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Identify & interpret transmission/transaxle concern, assure proper engine operation; determine necessary action.
A2.A.2
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Research applicable vehicle and service information, such as transmission/transaxle system operation, fluid type, vehicle service history, service precautions, and technical service bulletins.
A2.A.3
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)
A2.A.4
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose unusual fluid usage, level, and condition concerns; determine necessary action.
A2.A.5
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Perform pressure tests; determine necessary action. A2.A.6
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Perform stall test; determine necessary action. A2.A.7
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Perform lockup converter system tests; determine necessary action. A2.A.8
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose mechanical and vacuum control system concerns; determine action. A2.A.9
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose noise and vibration concerns; determine necessary action. A2.A.10
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.
A2.A.11
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.
A2.A.12
Carrier drives = overdrive Carrier driven = reduction Carrier held = reverse Two members held = direct drive Nothing driven or held = neutral Parking Pawl engaged to the output shaft = park
NATEF Task Area A2 Automatic Transmission & Transaxle A. General Transmission & Transaxle Diagnosis
Diagnose electrical/electronic concerns using principles of electricity (Ohms' Law) A2.A.13
NATEF Task Area A2 Automatic Transmission & Transaxle B. Transmission & Transaxle Maintenance & Adjustment
Inspect, adjust or replace throttle valve (TV) linkages or cables, manual shift linkages or cables; transmission range sensor; check gear select indicator (as applicable).
A2.B.1
NATEF Task Area A2 Automatic Transmission & Transaxle B. Transmission & Transaxle Maintenance & Adjustment
Service transmission; perform visual inspection; replace fluids and filters. A2.B.2
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect, adjust or replace (as applicable) vacuum modulator; inspect and repair or replace lines and hoses.
A2.C.1
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect, repair, and replace governor assembly. A2.C.2
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect and replace external seals and gaskets. A2.C.3
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect extension housing, bushings and seals; perform necessary action. A2.C.4
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect and replace speedometer drive gear, driven gear, vehicle speed sensor (VSS), and retainers.
A2.C.5
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Diagnose electronic transmission control systems using a scan tool; determine necessary action.
A2.C.6
NATEF Task Area A2 Automatic Transmission & Transaxle C. InVehicle Transmission & Transaxle Repair
Inspect, replace, and align powertrain mounts. A2.C.7
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Remove and reinstall transmission and torque converter (rearwheel drive). A2.D.1.1
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Remove and reinstall transaxle and torque converter assembly. A2.D.1.2
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Disassemble, clean, and inspect transmission & transaxle. A2.D.1.3
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Inspect, measure, clean, and replace valve body (includes surfaces and bores, springs, valves, sleeves, retainers, brackets, checkballs, screens, spacers, and gaskets), and torque valve body bolts.
A2.D.1.4
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Inspect servo bore, piston, seals, pin, spring, and retainers; determine necessary action.
A2.D.1.5
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Inspect accumulator bore, piston, seals, spring, and retainer; determine necessary action.
A2.D.1.6
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Assemble transmission/transaxle. A2.D.1.7
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair 1. Removal, Disassembly, and Reinstallation
Assemble transmission/transaxle. A2.D.1.8
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
2. Oil Pump & Torque Converter Inspect converter flex plate, attaching parts, pilot, pump drive, and seal areas. A2.D.2.1
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
2. Oil Pump & Torque Converter Measure torque converter endplay and check for interference; check stator one way clutch
A2.D.2.2
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
2. Oil Pump & Torque Converter Inspect, measure, and replace oil pump (F & R) assembly and components. A2.D.2.3
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Measure endplay or preload; determine necessary action. A2.D.3.1
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect, measure, and replace thrust washers and bearings. A2.D.3.2
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect, measure, and replace thrust washers and bearings. A2.D.3.3
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect bushings; determine necessary action. A2.D.3.4
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect and measure planetary gear assembly (includes sun, ring gear, thrust washers, planetary gears. and carrier assembly); determine necessary action.
A2.D.3.5
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action.
A2.D.3.6
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action.
A2.D.3.7
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect, measure, repair, adjust or replace transaxle final drive components. A2.D.3.8
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
3. Gear Train, Shafts, Bushings, & Transmission Case Inspect and reinstall parking pawl, shaft, spring, and retainer; determine necessary action.
A2.D.3.9
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
4. Friction & Reaction Units Inspect clutch drum, piston, checkballs, springs, retainers, seals, friction and pressure plates; determine necessary action.
A2.D.4.1
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
4. Friction & Reaction Units Measure clutch pack clearance; determine necessary action. A2.D.4.2
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
4. Friction & Reaction Units Air test operation of clutch and servo assemblies. A2.D.4.3
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
4. Friction & Reaction Units Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, and retainers; determine necessary action.
A2.D.4.4
NATEF Task Area A2 Automatic Transmission & Transaxle D. OffVehicle Transmission & Transaxle Repair
4. Friction & Reaction Units Inspect bands and drums; determine necessary action. A2.D.4.5
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