A professional who repairs defective automotive units, such as engines, transmissions, or differentials, in assembled vehicles, using handtools and power tools and applying knowledge of mechanical systems. Respnsibilities include:

• Reads inspection cards to determine defects in vehicle components.
• Disassembles and repairs defective units on assembled vehicles or replaces them with different units, using mechanic's handtools and portable power tools.
• Routes repaired vehicles to testing area for final inspection.
• May remove and repair defective units of completed automotive vehicles.
• May place malfunctioning units on repair stand, using hoist.
• May be designated according to type of unit repaired as differential repairer; engine repairer; transmission repairer.