Unit of competency details

MEM18043C - Diagnose and rectify automatic transmissions (Release 1)


Usage recommendation:
Is superseded by and equivalent to MEM27014 - Diagnose and rectify automatic transmissionsSupersedes and is equivalent to MEM18043C Diagnose and rectify automatic transmissions 25/Jun/2019

ReleaseRelease date
1 1 (this release) 01/Dec/2005


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030503 Vehicle Mechanics  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030503 Vehicle Mechanics  31/Aug/2006 
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Modification History

Not Applicable

Unit Descriptor

Unit descriptor 

This unit covers assessing converter/transmission operation, and repairing or replacing faulty components.

Application of the Unit

Application of the unit 

The unit applies to testing and repair or replacement activities associated with automatic, semi automatic and hydrostatic transmissions, and fluid coupling/torque converter assemblies. Control of lockup/shifting etc. can be either fully hydraulic or electronic. Testing and assessment of performance would typically require operation of the plant or equipment.

Band :

Unit Weight :

Licensing/Regulatory Information

Not Applicable


Prerequisite units 

Path 1 


Interpret technical drawing


Perform engineering measurements


Use hand tools


Use power tools/hand held operations


Dismantle, replace and assemble engineering components

Employability Skills Information

Employability skills 

This unit contains employability skills.

Elements and Performance Criteria Pre-Content

Elements describe the essential outcomes of a unit of competency.

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide.

Elements and Performance Criteria



1. Assess converter/transmission operation

1.1. Torque converter, simple and compound planetary gearing, and hydraulic control operating principles are understood.

1.2. Relevant information is obtained and is correctly interpreted prior to any testing.

1.3. Preliminary checks are undertaken safely and to prescribed procedures.

1.4. Faults are correctly isolated to component level and appropriate corrective action is determined.

1.5. Test equipment is adapted and used correctly.

1.6. Component parts are correctly assessed for reuse or replacement.

2. Repair/replace faulty components

2.1. Component wear and clearances are correctly determined using appropriate test equipment and manufacturers' recommendations.

2.2. Replacement components are correctly selected using manufacturers' data.

2.3. Components are removed and refitted to converter/transmission assembly following prescribed procedures.

2.4. Adjustments are made correctly using appropriate tooling/equipment and manufacturers' data.

2.5. Test and rectification activities are accurately recorded.

2.6. Converter/transmission assembly is free of excessive noise and operates to specification after repair work is carried out.

Required Skills and Knowledge


This section describes the skills and knowledge required for this unit.

Required skills 

Look for evidence that confirms skills in:

  • reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents
  • planning and sequencing operations
  • checking task-related information
  • checking for conformance to specification
  • identifying faulty automatic transmission components
  • checking the automatic transmission for correct operation
  • using test equipment correctly
  • testing the transmission components for conformance to specification
  • identifying component parts for reuse or replacement
  • removing and refitting components to the automatic transmission assembly
  • adjusting automatic transmission components using appropriate tools, techniques and equipment
  • recording test and rectification activities
  • identifying replacement components using manufacturers' data
  • operating the automatic transmission assembly free of excessive noise and in conformance to specifications
  • undertaking calculations and numerical operations within the scope of this unit

Required knowledge 

Look for evidence that confirms knowledge of:

  • the principles of operation of automatic transmissions
  • the function of torque converters, planetary gearing and hydraulic controls in automatic transmissions
  • the procedures for checking automatic transmissions for correct operation
  • the appropriate action to correct the faulty component(s)
  • the test equipment to be used in checking/testing automatic transmissions for correct operation
  • the reasons for selecting the chosen test equipment
  • the procedures for testing automatic transmissions, including any necessary adaptation of test equipment
  • the procedures for checking automatic transmission components for wear and clearance
  • the tools, techniques and equipment to be used to determine component wear and clearance
  • the reasons for selecting the chosen tools, techniques and equipment
  • the procedures for removing and refitting automatic transmission components
  • the procedures for adjusting automatic transmission components
  • the tools, techniques and equipment to be used to maintain and repair automatic transmission assemblies
  • the effects of the adjustments on automatic transmission operation
  • the procedures for recording test and rectification activities
  • the automatic transmission assembly specifications
  • hazards and control measures associate with testing and rectifying automatic transmissions, including housekeeping
  • safe work practices and procedures

Evidence Guide


The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment 

A person who demonstrates competency in this unit must be able to diagnose and rectify automatic transmissions. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Context of and specific resources for assessment 

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with diagnosing and rectifying automatic transmissions, or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment 

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Guidance information for assessment 

Range Statement


The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Unit Sector(s)

Unit sector 

Co-requisite units

Co-requisite units 

Competency field

Competency field