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Automatic Transmission Level 3

AUTO 202W

Automatic Transmission Level 3

AUTO 202W

Course Description

Prerequisite: AUTO 152 with a minimum grade of "C". Practices the diagnostic procedures and repair of many automatic transmissions. Practices NATEF tasks to MAST (Master Automotive Service Technology) level related to automatic transmissions.(45-51)

Outcomes and Objectives

Complete general Automotive Transmission and Trnasaxle Level 3 NATEF tasks as listed below.

Objectives:

  • Identify and interpret transmission/transaxle concern, differentiate between engine performance and transmission/transaxle concerns; determine necessary action.
  • Research applicable vehicle and service information fluid type, vehicle service history, service precautions, and technical service bulletins.
  • Diagnose fluid loss and condition concerns; determine necessary action.
  • Check fluid level in a transmission or a transaxle equipped with a dip-stick.
  • Check fluid level in a transmission or a transaxle not equipped with a dip-stick.
  • Perform pressure tests (including transmissions/transaxles equipped with electronic pressure control); determine necessary action.
  • Diagnose noise and vibration concerns; determine necessary action.
  • Perform stall test; determine necessary action.
  • Perform lock-up converter system tests; determine necessary action.
  • Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles.
  • Diagnose electronic transmission/transaxle control systems using appropriate test equipment and service information.
  • Diagnose pressure concerns in a transmission using hydraulic principles (Pascal’s Law).

Complete Level 3 NATEF tasks related to In-Vehicle Transmission/Transaxle as listed below.

Objectives:

  • Inspect, adjust, and replace external manual valve shift linkage, transmission range sensor/switch, and park/neutral position switch.
  • Inspect for leakage; replace external seals, gaskets, and bushings.
  • Inspect, test, adjust, repair, or replace electrical/electronic components and circuits including computers, solenoids, sensors, relays, terminals, connectors, switches, and harnesses.
  • Drain and replace fluid and filter(s).
  • Inspect powertrain mounts.

Complete Level 3 NATEF tasks related to Off-Vehicle Transmission and Transaxle Repair as listed below.

Objectives:

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