ASEP 123 - Transmissions and Drivelines Level 2

Credits: 4
Instructional Contact Hours: 4

1. TRANSMISSIONS AND DRIVELINES

1. Diagnose and complete general Level 2 ASE Education Foundation tasks for Transmissions and Drivelines.
   1. Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including xEVs and/or vehicles equipped with advanced driver assistance systems (ADAS).
   2. Identify automatic transmission and transaxle components and configurations, including torque converter automatic, dual-clutch automatic (DCT), CVT, and xEV drive.
   3. Retrieve and record on-board diagnostics, DTCs, monitor status, and freeze frame data; clear codes and data when directed.
   4. Inspect transmission fluid condition; check fluid level; inspect for leaks on transmission or transaxle equipped with a dipstick.
   5. Inspect transmission fluid condition; check fluid level; inspect for leaks on transmission or transaxle not equipped with a dipstick.
   6. Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.
   7. Diagnose pressure concerns in a transmission using hydraulic principles (Pascal's Law).
   8. Identify and interpret transmission/transaxle concerns, differentiate between engine performance and transmission/transaxle concerns; determine needed action.
   9. Diagnose fluid loss and condition concerns; determine needed action.
   10. Perform stall test; determine needed action.
   11. Perform lock-up converter system tests; determine needed action.
   12. Perform pressure tests on transmissions/transaxles equipped with electronic pressure control; determine needed action.
   13. Diagnose electronic transmission/transaxle control systems using appropriate test equipment and service information.
2. Diagnose and complete general Level 2 ASE Education Foundation tasks for In-Vehicle Transmission/Transaxle.
   1. Inspect, adjust, and/or replace external manual valve shift linkage, transmission range sensor/switch, and/or park/neutral position switch.
   2. Drain and replace fluid and filter(s); use proper fluid type per manufacturer specification.
   3. Perform procedures.
   4. Inspect, replace and/or align power train mounts.
   5. Inspect for leakage; replace external seals, gaskets, and bushings.
   6. Inspect, test, adjust, repair, and/or replace electrical/electronic components and circuits.
3. Diagnose and complete Level 2 ASE Education Foundation tasks for Off-Vehicle Transmission and Transaxle.

1. Describe the operational characteristics of a continuously variable transmission (CVT).
2. Describe the operational characteristics of a hybrid vehicle drive train.
3. Describe the operational characteristics of dual-clutch transmission (DCT).
4. Remove and reinstall transmission/transaxle and torque converter; inspect engine core plugs, rear crankshaft seal, dowel pins, dowel pin holes, and mating surfaces.
5. Inspect, leak test, flush, and/or replace transmission/transaxle oil cooler, lines, and fittings.
6. Inspect converter flex (drive) plate, converter attaching bolts, converter pilot, converter pump drive surfaces, converter end play, and crankshaft pilot bore.

2. MANUAL DRIVE TRAIN AND AXLES

1. Diagnose and complete general Level 2 ASE Education Foundation tasks for Manual Drive Train and Axles.

1. Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including xEVs and vehicles equipped with advanced driver assistance systems (ADAS).
2. Identify manual drive train and axles components and configurations.
3. Retrieve and record on-board diagnostics, DTCs, monitor status, and freeze frame data; clear codes and data when directed.
4. Check fluid condition; check for leaks; determine needed action.
5. Drain and refill manual transmission/transaxle; use proper fluid type per manufacturer specification.
6. Diagnose drive train concerns; determine needed action.

2. Diagnose and complete Level 2 ASE Education Foundation tasks for Clutch.

1. Check and adjust clutch primary cylinder fluid level; check for leaks; use proper fluid type per manufacturer specification.
2. Diagnose clutch noise, binding, slippage, pulsation, and chatter; determine needed action.
3. Inspect clutch pedal linkage, cables, automatic adjuster mechanisms, brackets, bushings, pivots, and springs; determine needed action.
4. Inspect clutch pressure plate assembly, clutch disc, release (throw-out) bearing, linkage, and pilot bearing/bushing (as applicable).
5. Bleed clutch hydraulic system.
6. Inspect flywheel and ring gear for wear and cracks, and discoloration; determine needed action.
7. Measure flywheel runout and crankshaft end play; determine needed action.
8. Describe the operation and service of a system that uses a dual mass flywheel.

3. Diagnose and complete Level 2 ASE Education Foundation tasks for Transmission/Transaxle.

1. Inspect, adjust, lubricate, and/or replace shift linkages, brackets, bushings, cables, pivots, and levers.

4. Diagnose and complete Level 2 ASE Education Foundation tasks for Drive Shaft and Half Shaft, Universal and Constant-Velocity (CV) Joints (Front, Rear, All and Four-wheel Drive).

1. Inspect and/or remove/replace bearings, hubs, and seals.
2. Inspect and/or service/replace shafts, yokes, boots, and universal/CV joints.
3. Diagnose constant-velocity (CV) joint noise and vibration concerns; determine needed action.
4. Diagnose universal joint noise and vibration concerns; determine needed action.
5. Check shaft balance and phasing; measure shaft runout; measure and adjust driveline angles; determine needed action.

5. Diagnose and complete Level 2 ASE Education Foundation tasks for Differential and Drive Axles.

1. Ring and Pinion Gears and Differential Housing Assembly

1. Inspect differential housing; check for leaks; inspect housing vent.
2. Check and adjust differential housing fluid level; use proper fluid type per manufacturer specification.
3. Drain and refill differential housing; using proper fluid type per manufacturer specification.
4. Inspect and replace companion flange and/or pinion seal; measure companion flange runout.
5. Demonstrate knowledge of drive pinion and ring gear service and set up including depth, preload, backlash and gear tooth contact.

2. Drive Axles

1. Inspect and replace drive axle wheel studs.
2. Remove and replace drive axle shafts.
3. Inspect and replace drive axle shaft seals, bearings, and retainers.
4. Measure drive axle flange runout and shaft end play; determine needed action.

6. Diagnose and complete Level 2 ASE Education Foundation tasks for Four-wheel Drive/All-wheel Drive.

1. Identify concerns related to variations in tire circumference and/or final drive ratios.
2. Check for leaks at drive assembly and transfer case seals; check vents; check fluid level; use proper fluid type per manufacturer specification
3. Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets.
4. Inspect axle locking mechanisms; determine needed action(s).