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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare to diagnose and repair heavy vehicle automatic transmission
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
2. Diagnose automatic transmission
   • Diagnostic tests are carried out according to manufacturer specifications, workplace procedures, and environmental and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings, including recommendations for necessary repairs or adjustments, are reported according to workplace procedures
3. Repair automatic transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked according to manufacturer procedures
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or systems
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
4. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vehicle or transmission is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
5. Prepare to diagnose and repair heavy vehicle automatic transmission
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
6. Diagnose automatic transmission
   • Diagnostic tests are carried out according to manufacturer specifications, workplace procedures, and environmental and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings, including recommendations for necessary repairs or adjustments, are reported according to workplace procedures
7. Repair automatic transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked according to manufacturer procedures
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or systems
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
8. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vehicle or transmission is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety requirements must include:	work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for: using transmission lifting and supporting equipment isolating and stabilising vehicles.
Environmental requirements must include:	procedures for trapping, storing and disposing of oils and fluids released from automatic transmissions.

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Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

disassemble and reassemble one heavy vehicle automatic transmission

diagnose and repair a fault in two of the following components of a heavy vehicle automatic transmission:

torque converter

transmission oil pump

front pump seal

valve body

shift or pressure solenoid

clutch pack

one-way clutch

planetary gear set

internal bearings or thrust washers

gasket and seal leaks

governor

sensors

heat exchanger

remove, refit or replace a heavy vehicle automatic transmission.

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Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing automatic transmissions, including procedures for:

using transmission lifting and supporting equipment

isolating and stabilising vehicles

environmental requirements, including procedures for trapping, storing and disposing of oils and fluids released from automatic transmissions

operating principles of heavy vehicle automatic transmissions and associated components, including:

fluid couplings

mechanical systems, including:

gear types

gear ratios and torque

simple and compound planetary gear trains

gear range and transfer case power flows

hydraulic systems

electronic systems, including:

electronic control unit (ECU)

electronic sensors

solenoids

application, purpose and operation of heavy vehicle automatic transmissions and components, including:

torque converters, including:

impeller, stator, one-way clutch and turbine operation

lock-up torque converters

automatic transmission mechanical components, including:

clutch packs, one-way clutches, simple and compound planetary gear sets, and transfer case

power flows, including:

longitudinal automatic transmissions

transfer case

power take-off

automatic transmission hydraulic components and hydraulic control components, including:

oil pumps

valve body and hydraulic valves

heat exchanger

automatic transmission electronic components, including:

ECU input sensors

ECU outputs

diagnostic testing procedures for heavy vehicle automatic transmissions, including:

stall testing

pressure testing

scan tool testing

repair procedures for heavy vehicle automatic transmissions, including for hydraulic, mechanical and electrical components

dismantling procedures for heavy vehicle automatic transmissions, including:

measuring clearances and tolerances

inspecting components

post-repair testing procedures for heavy vehicle automatic transmissions.

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