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Automotive Parts Rebuilders Association (apra)

A trade association of automotive parts Rebuilders and suppliers of remanufactured parts.

Automotive Power Brakes

A brake system having a vacuum and atmospheric air-operated power booster or hydraulic power boost to multiply braking force.

Automotive Recyclers Association (ara)

International association of automotive recyclers, owners and dealers in used car and truck parts.

Automotive Retailers Association (ara)

An association of the automotive retailers, sales and service, including collision repairs, mechanical repairs, used car sales, auto wrecking, and towing.

Automotive Service Association (asa)

A trade organization for body, mechanical, and transmission shop owners.

Automotive Service Industry Association (asia)

A trade association for those who manufacture, distribute, and sell parts, tools, and equipment to the do-it-yourself (DIY) market and professional aftermarket.

Automotive Warehouse Distributors Association (awda)

An association of major manufacturers and warehouse distributors of aftermarket parts.

Autoset

A feature that allowes the oscilloscope to sample the incoming electrical signal and adjust the voltage scale and time base to display a readable signal.

Autronic Eye

A trade term for automatic headlight dimmer.

Aux

1. An acronym form of auxiliary. 2. An auxiliary item of equipment, such as aux fuel tank.

Auxiliary

A spare; an extra; a back-up system.

Auxiliary Air Valve

A device that allows air to bypass a closed throttle during engine start-up and warm-up.

Auxiliary Drum Parking Brake

The incorporation of an auxiliary parking-brake drum inside a rear rotor on some four-wheel drive disc-brake system.

Auxiliary Input

A feature on some head units that makes it possible to plug in another device, such as a personal MP3 player, a mini disc (MD) player, a cassette player or even a videocassette player or video game system. The sound for the input device then is played through the vehicle's sound system.

Auxiliary Lighting

Any lights that did not originally come on a vehicle, including fog lights and lights mounted on top of a truck for better visibility off-highway.

Auxiliary Seal

A secondary seal mounted outside the seal housing 1. To prevent refrigeration oil from escaping and entering the clutch assembly. 2. To aid in the prevention of the loss of fluid from a system.

Auxiliary Section

The section of a transmission housing the auxiliary drive gear, main shaft assembly, countershaft,, and synchronizer assembly, where range shifting occurs.

Auxiliary Shaft

A separate shaft, in an overhead cam engine, that drives devices such as the fuel pump, oil pump, and distributor.

Auxiliary Springs

1. A second or third valve spring with a different resonant frequency to cancel out harmonic vibrations that limit engine speed. 2. The spring(s) added to a vehicle, generally in the rear, to support a heavy load.

Auxiliary Venturi

A small secondary venturi mounted inside the main venturi of a carburetor to provide increased air velocity. May also be called a booster venturi.