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Lockplate

A metal washer-like device with tabs that may be bent around a nut or bolt head to prevent them from turning.

Lockstrap

A manual adjustment mechanism that allows adjustment of free travel of a lever or rod.

Lockup

The point at which braking power overcomes the traction of the vehicle's tires and skidding occurs, causing loss of control, lost stopping distances, and flat-spotting of the tires.

Lockup Clutch

A type of clutch in which the torque converter turbine is locked up with the engine, eliminating slippage.

Lockup Torque Converter

A fluid clutch designed with a clutching assembly in an automatic transmission to improve coupling efficiency at a predetermined vehicle speed.

Loctite

A trade name for a line of sealants and adhesives that are popular in the automotive industry.

Logic Analyzer

An instrument used to make the logic state of many digital signals visable over time It analyzes the digital data and can represent the data as real-time software execution, data flow values, state sequences, ect.

Logic Circuits

An interconnection of individual combinational and sequential logic circuits to perform decision making, control and computation using digital techniques.

Logic Probe

A probe used for circuit analysis, displaying digital levels of 1 and 0 with light outputs.

Long And Short Term Adaptive's

See long term fuel trim.

Long Arm

The throw of a crankshaft after it has been stroked.

Long Block

An assembled engine block that contains all of the components from the intake manifold to the exhaust ports..

Long Gear

A final drive with a low gear ratio providing high gearing.

Long Term Adaptive

Longft.

Long Term Fuel Trim

The long term fuel injector pulse width compensation the engine controller has stored to maintain minimum emissions output. Long term fuel trim drives Short Term Fuel Trim to maximum operating efficiency.

Long, Short Arm Suspension

A front suspension system where the upper control arm is shorter than the lower control arm, allowing each wheel to compensate for changes in the road surface while greatly affecting the opposite wheel in a manner that allows the wheel and tire assembly to rise and fall vertically as it goes over bumps.

Longbed

The cargo area of a long-wheelbase pickup truck.

Longest Leaf

A term used for the main leaf.

LONGFT

Long Term Fuel Trim.

Longitudinal

Mounted front to back as in a rear wheel drive vehicles engine.