Australian Automotive Glossary

Gain

The ratio of a system’s output magnitude to its input magnitude....
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Galvanized Steel

A specially zinc-coated steel used on many panels of a vehicle to help prevent rust and corrosion...
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Gap

Space between two electrodes or contact-breaker points, air gap, spark plug gap...
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Gas Filled Shock Absorbers

A nitrogen gas chamber is used to pressurize the shock absorber in place of the traditional air/oil combination. Gas filled shock absorbers provide more stable damping in a variety of conditions and thus improves ride and road contact....
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Gasket

Any thin, soft material installed between two metal surfaces to create a seal. May be copper, cork, rubber or paper....
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Gear

Wheel-shaped parts with teeth cut into the edge. When one gear engages another, the second gear drives the other to transmit power....
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Gear Oil

A heavy oil, rated at 80 to 100 weight viscosity that is used in enclosed units containing gears. Gear oil rarely needs changing...
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Gear Ratio

The number of revolutions a driving (pinion) gear requires to turn a driven (ring) gear through one complete revolution. For a pair of gears, the ratio is found by dividing the number of teeth on the driven gear by the number of teeth on the driving pinion gear....
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