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Variable-Pitch Spring

A valve spring with unevenly spaced coils.

Variable-Pitch Stator

A torque-converter design for transmissions used in off-highway, special-equipment applications.

Variable-Rate Coil Spring

A spring having an average spring rate based on load at a predetermined deflection in a variety of wire sizes and shapes.

Variable-Rate Spring

A spring that increasingly resists deflection as the load is increased, such as a coil spring having its coils closer together at one end, or in a single-leaf spring that is thinner near the ends.

Variable-Ratio Power Steering

A power-steering system in which the response of the vehicle wheels varies according to how much the steering wheel is turned.

Variable-Ratio Steering

A power-steering system that varies the steering ratio at different vehicle speeds.

Variable-Speed Fan

A fan having a fluid-filled or thermostatic-actuated clutch that senses the temperature of the air coming through the radiator and adjusts its speed accordingly.

Varistor

A semiconductor whose resistance decreases as the voltage is increased.

Varnish

1. A coating of deposits that collect on parts; caused by oxidation and contamination of liquids; can cause binding or restriction 2. Baked on oil and grease.

VARV

Vacuum altitude reducer valve.

VAT

Vane air temperature.

VAT-40

Volt amp tester model 40 (analog).

VAT-60

Volt amp tester model 60 (digital).

VATS

Vehicle Anti-Theft System.

VAV

Vacuum advance valve.

VBOC

Vacuum bleed-off valve.

VCC

Viscous converter clutch.

VCIM

Acronym for Vehicle Communication Interface Module(GM).

VCM

[1] an acronym for Vehicle Control Module The on-bord computer that controls the engine management, transmission, and other systems such as antilock brakes.

VCOTVV

Vacuum controlled orifice tank vapor valve.