AUT 242 - Basic Automotive Powertrain

1. 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.
2. Drivetrain Fundamentals.
   1. Define the purpose of the automotive drivetrain.
   2. Identify and explain the common drivetrain configurations.
   3. Identify the drivetrain components and explain their function.
   4. Identify different types of transmissions and transaxles.
   5. Describe the concepts of torque multiplication.
   6. List the methods of obtaining gear reduction, overdrive, reverse, neutral and the forward gears.
3. Flywheel Clutch Assembly Fundamentals.
   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. Explain the operation of the clutch pressure plate and friction disc.
   4. Explain the operation of the clutch release bearing.
   5. Explain clutch freeplay.
   6. Explain the operation of a self-adjusting clutch.
4. Manual Transmission/Transaxle Design and Operation.
   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. Identify common transmission terms and explain transmission construction.
   4. Explain power flow through a manual transmission/transaxle.
   5. Identify terms associated with final drives and differentials for transaxles and explain their operation.
   6. Explain the operation of transmission/transaxle shift linkage.
   7. Explain how transmissions/transaxles are internally lubricated and sealed.
5. Off-Vehicle Manual Transmission/Transaxle Diagnosis and Repair
   1. Disassemble, inspect, clean, and reassemble internal transmission/transaxle components.
   2. Inspect transmission/transaxle case and case mating surfaces, extension housing, bores, bushings, and vents; determine necessary actions.
   3. Inspect and replace gaskets, seals, and sealants; inspect sealing surfaces.
   4. Measure endplay and/or preload on transmission/transaxle shafts; determine necessary action.
   5. Inspect and re-install synchronizer hub, sleeves, keys (inserts), springs, and blocker rings.
6. Automatic Transmission/Transaxle Design and Operation.
   1. Describe basic automatic transmission/transaxle operation.
   2. Describe the basic laws of physics involved with an automatic transmission operation.
   3. Classify automatic transmissions according to the power train configuration.
   4. Identify the major components in a torque converter and explain their purpose.
   5. Describe the design and operation of the hydraulic controls used in modern transmissions.
   6. Identify the major apply components in an automatic transmission.
   7. Identify the components in a basic planetary gear set and describe their operation.
   8. Describe the purpose and operation of common friction and reaction members.
   9. Describe the operational characteristics of a continuously variable transmission (CVT).
   10. Describe the operational characteristics of a hybrid vehicle drive train.
7. Off-Vehicle Automatic Transmission/Transaxle Repair.
   1. Remove and reinstall transmission/transaxle and torque converter.
   2. Perform inspection and bench testing of torque convertors.
   3. Disassemble, clean, and inspect transmission/transaxle.
   4. Inspect, measure, clean, and replace valve body (includes surfaces, bores, springs, valves, sleeves, retainers, brackets, check valves/balls, screens, spacers, and gaskets).
   5. Inspect servo and accumulator bores, pistons, seals, pins, springs, and retainers; determine necessary action.
   6. Inspect, measure, and reseal oil pump assembly and components.
   7. Measure transmission/transaxle end play or preload; determine necessary action.
   8. Inspect, measure, and replace thrust washers and bearings.
   9. Inspect oil delivery circuits, including seal rings, ring grooves, and sealing surface areas, feed pipes, orifices, and check valves/balls.
   10. Inspect bushings; determine necessary action.
   11. Inspect and measure planetary gear assembly components; determine necessary action.
   12. Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action.
   13. Diagnose and inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action.
   14. Inspect, measure, repair, adjust or replace transaxle final drive components.
   15. Inspect clutch drum, piston, check-balls, springs, retainers, seals, and friction and pressure plates, bands and drums; determine necessary action.
   16. Measure clutch pack clearance; determine necessary action.
   17. Air test operation of clutch and servo assemblies.
   18. Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, retainers; determine necessary action.
   19. Assemble transmission/transaxle.
8. Four-wheel Drive/All-wheel Drive System Operation.
   1. Identify and explain the operation of four-wheel drive systems.
   2. Name the major components of conventional four-wheel-drive systems.
   3. Discuss the purpose and operation of 4WD locking/unlocking mechanisms.
   4. Name the components of a transfer case.
   5. Explain the difference between four-wheel-drive (4WD) and all-wheel-drive (AWD).
   6. Explain the operation of viscous clutches used in all-wheel-drive systems.
9. Four-wheel Drive/All-wheel Drive Component Diagnosis and Repair.
   1. Disassemble, service, and reassemble transfer case and components.