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Speed Sensor

An electrical device that can sense the rotational speed of a shaft or member and transmit this information to another device, such as a readout.

Speed Shift

1. To up shift a manual transmission without releasing the accelerator. 2. The art of up shifting a manual transmission without using the clutch.

Speedometer

An instrument, usually dash mounted, used to measure the speed of a vehicle.

Speedster

An open, two-passenger roadster.

Speedway

1. A large oval-track racing facility. 2. (Speedway) the Indianapolis Motor Speedway.

SPFI

An abbreviation for sequential-port fuel injection.

Spherical Joint

A term used for ball joint.

Spider

A set of gears in the differential that allow the rear wheels to rotate at different speeds as the vehicle is cornering.

Spider Gears

See Spider.

Spin

To skid out of control by 180 degrees or more.

Spin On Filter

An oil filter having a threaded attachment for the ease and speed of replacement.

Spindle

1. A shaft or stub axle upon which the wheel hub and bearing rides. 2. A shaft which carries either cutting tools or work that is being machined.

Spinner

A term used for knock-off hub.

Spinning Balancer

A balancer that rotates the tire and wheel to determine the amount and location of any unbalanced condition.

Spiral Bevel Gears

A differential ring gear with helical gear teeth.

Spiral Spring

Springs formed from flat strip of wire wound in the form of a spiral, loaded by torque about an axis, normal to the plane of the spiral.

Spiral-grooved Shock Absorber

An arrangement that is used to reduce the mixture of air with the fluid as it passes through the valves by breaking up the air bubble and, at the same time, reducing lag.

SPK

Spark control system.

SPK-AVM

Spark control system-advance vacuum modulator.

SPK-BVSV

Spark control system-bimetal vacuum switching valve.