AUT 255 - Adv Automotive Powertrain

Credits: 5
Lecture Hours: 1
Lab Hours: 8
Practicum Hours: 0
Work Experience: 0
Course Type: Voc/Tech

The student will study powertrain and drive line systems. Proper diagnosis procedures, service and repair will be emphasized through hands-on experience.
Prerequisite: AUT 254
Competencies

Perform proper shop safety procedures
1. Apply work area safety skills
2. Demonstrate safe personal working habits
3. Practice safe tool and equipment usage
4. Follow manufacturers repair procedures
5. Follow manufacturer and government warnings and regulations
Evaluate automatic transmission/transaxle
1. Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including vehicles equipped with advanced driver assistance systems (ADAS)
2. Retrieve and record DTCs, OBD monitor status, and freeze frame data; clear codes and data when directed
3. Inspect transmission fluid condition; check fluid level; inspect for leaks on transmission or transaxle equipped with a dipstick
4. Inspect transmission fluid condition; check fluid level; inspect for leaks on transmission or transaxle not equipped with a dipstick
Analyze automatic transmission/transaxle for diagnosis and repair
1. Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles
2. Diagnose pressure concerns in a transmission using hydraulic principles (Pascal’s Law)
3. Identify and interpret transmission/transaxle concerns, differentiate between engine performance and transmission/transaxle concerns; determine needed action
4. Diagnose fluid loss and condition concerns; determine needed action
5. Perform stall test; determine needed action
6. Perform lock-up converter system tests; determine needed action
7. Perform pressure tests on transmissions/transaxles equipped with electronic pressure control; determine needed action
8. Diagnose electronic transmission/transaxle control systems using appropriate test equipment and service information
9. Diagnose noise and vibration concerns; determine needed action
Analyze automatic transmission/transaxle In-vehicle maintenance and repair
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 relearn procedures
4. Inspect, replace/or and align powertrain mounts
5. Inspect for leakage; replace external seals, gaskets, and bushings
6. Inspect, test, adjust, repair, and/or replace electrical/electronic components and circuits
Assess off-vehicle transmission and transaxle repair
1. Remove and reinstall transmission/transaxle and torque converter; inspect engine core plugs, rear crankshaft seal, dowel pins, dowel pin holes, and mounting surfaces
2. Inspect, leak test, flush, and/or replace transmission/transaxle oil cooler, lines, and fittings
3. Inspect converter flex (drive) plate, converter attaching bolts, converter pilot, converter pump drive surfaces, converter end play, and crankshaft pilot bore
Analyze manual drivetrain and axles
1. Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including vehicles equipped with advanced driver assistance systems (ADAS)
2. Identify manual drive train and axles components and configurations
3. Retrieve and record DTCs, OBD 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
Evaluate manual drivetrain and axle for diagnoses and repair
1. Identify and interpret drive train concerns; determine necessary action
2. Research applicable vehicle and service information, fluid type, vehicle service history, service precautions, and technical service bulletins
3. Check fluid condition; check for leaks; determine necessary action
4. Drain and refill manual transmission/transaxle and final drive unit
Analyze flywheel clutch assembly
1. Identify different types of automotive clutches and define their major components
2. Identify the different types of automotive flywheels and explain their purpose
3. Describe the operation and service of a system that uses a dual mass flywheel
4. Explain the operation of the clutch pressure plate and friction disc
5. Explain the operation of the clutch release bearing
6. Explain clutch freeplay
7. Explain the operation of a self-adjusting clutch
Assess clutch systems for diagnosis and repair
1. Check and adjust clutch master 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 and/or replace 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, cracks, and discoloration; determine needed action
7. Measure flywheel runout and crankshaft end play; determine needed action
Evaluate manual transmission/transaxle for diagnosis and repair
1. Describe the operational characteristics of an electronically controlled manual transmission/transaxle
2. Inspect, adjust, lubricate, and/or replace shift linkages, brackets, bushings, cables, pivots, and levers
3. Diagnose noise concerns through the application of transmission/transaxle powerflow principles; determine needed action
4. Diagnose hard shifting and jumping out of gear concerns; determine needed action
5. Diagnose transaxle final drive assembly noise and vibration concerns; determine needed action
6. Disassemble, inspect clean, and reassemble internal transmission/transaxle components
Assess constant velocity shaft(s) /drive shaft(s) and Universal Joint(s) for diagnosis and repair
1. Identify types of constant velocity (CV) joints and explain their operation
2. Identify types of universal joints and explain their operation
3. Inspect and/or remove/replace bearings, hubs, and seals
4. Inspect and/or service/replace shafts, yokes, boots, and universal/CV joints
5. Check for leaks at drive assembly and transfer case seals; check vents; check fluid level; use proper fluid type per manufacturer specification
6. Diagnose constant-velocity (CV) joint noise and vibration concerns; determine needed action
7. Diagnose universal joint noise and vibration concerns; determine needed action
8. Check shaft balance and phasing; measure shaft runout; measure and adjust driveline angles; determine needed action
Analyze ring and pinion gears and differential case
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; use proper fluid type per manufacturer specification
Evaluate ring and pinion gears and differential case for diagnosis and repair
1. Inspect and replace companion flange and/or pinion seal; measure companion flange runout
2. Inspect ring gear and measure runout; determine needed action
3. Diagnose noise and vibration concerns; determine needed action
4. Remove, inspect, reinstall or replace drive pinion and ring gear, spacers, sleeves, and bearings
5. Measure and adjust drive pinion depth
6. Measure and adjust drive pinion bearing preload
7. Measure and adjust side bearing preload and ring and pinion gear total backlash and backlash variation on a differential carrier assembly (threaded cup or shim types)
8. Check ring and pinion tooth contact patterns; determine needed action
9. Disassemble, inspect, measure, adjust, and/or replace differential pinion gears (spiders), shaft, side gears, side bearings, thrust washers, and case
10. Reassemble and reinstall differential case assembly; measure runout; determine needed action
Analyze 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
5. Diagnose drive axle shafts, bearings, and seals for noise, vibration, and fluid leakage concerns; determine needed action
Assess limited slip differential for diagnosis and repair
1. Diagnose limited slip differential noise, slippage, and chatter concerns, determine necessary action
2. Measure limited slip differential rotating torque, determine necessary action
Evaluate four-wheel drive/all-wheel drive components for diagnosis and repair
1. Identify concerns related to variations in tire circumference and/or final drive ratios
2. Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets
3. Inspect axle-locking mechanisms; determine needed action(s)
4. Check for leaks at drive assembly and transfer case seals; check vents; check fluid level; use proper fluid type per manufacturer specification
5. Diagnose noise, vibration, and unusual steering concerns; determine needed action

Competencies Revised Date: AY2023