Glossary “friction modifier” Definition:
1). Class of materials used in brake linings to modify the final coefficient of friction of the linings. 2). Additives used to alter the friction coefficient of a liquid such as ATF or gear lube.

Glossary “friction material” Definition:
One of several types of material used for friction surfacing, such as metallic friction material or organic friction material.

Glossary “friction modified fluid” Definition:
ATF that provides smooth automatic shifts; designed to slip.

Glossary “friction bearing” Definition:
Bearing in which there is a sliding contact between the moving surfaces, such as a connecting rod bearing.

Glossary “friction disc” Definition:
Flat disc surfaced with a friction material on one or both sides, such as a clutch disc.

Glossary “friction facing” Definition:
Hard-molded or woven material that is riveted or bonded to the clutch-driven disc.

Glossary “friction horsepower” Definition:
Engine horsepower losses due to friction from such sources as the engine, transmission, and drive train.

Glossary “friction ball joint” Definition:
Term used for load carrying ball joints.