Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.



An optional gear that allows the drive wheels to turn faster than the engine. It allows for better fuel efficiency during high speed highway driving.

See Also:
Manual Transmission
Front-Wheel Drive
Throw-out Bearing
Stick Shift
Oil Pan
Passing Gear
Diesel Engine

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