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Oscillator

This semiconductor device creates a rapid back-and-forth movement of voltage.

Oscilloscope

An instrument that produces a visible image of one or more rapidly varying electrical quantities with respect to time or with another electrical quality.

OSHA

An acronym for Occupational Safety and Health Administration. A division of the U.S. Department of Labor that establishes and enforces workplace safety regulations.

OSSM

Abbreviation for Overland Suspension System Module (Chrysler).

OTC

[1] Oil temperature switch [2] An abbreviation for Ohio Tool Company a make and supplier of automotive tools and equipment.

OTIS

Acronym for Overhead Travler Information System (Chrysler).

Otto Cycle

The basic principle of operation of the four-stroke piston engine.

Otto-cycle Engine

A four-stroke cycle engine.

Out Of Phase

A term that relates to a drive shaft having two universal joints that are not in phase with each other, producing a jouncing or jerking motion as the drive shaft turns.

Out Of Round

The condition of a circular part when it is not circular, as in slightly oval shaped.

Out Of Square

The condition of a square or rectangular part when its vertical sides are not at right angles to its horizontal sides.

Out Of The Box

A vehicle, device, or component that is absolutely stock without modification.

Out Of The Chute

Off the starting line in a drag race. Also known as out of the gate and out of the hole.

Out Of The Gate

Same as out of the chute.

Out Of The Hole

Same as out of the chute.

Out To Lunch

1. Anything of no value. 2. A worthless car.

Outboard Brakes

A brake assembly that is mounted at the outer or wheel end of an axle half shaft.

Outer Cam Clutch

A one-way roller clutch which has the cam profile surfaces on the outer element.

Outer Race

The race nearest to the outside of the hub of a roller bearing.

Outgas

To release gas from a solid, such as plastic, as the result of heat generated during machining or cutting.