Glossary “internal leaks” Definition:
Leaks that exist or develop inside a transmission or other component, some being ordinary and acceptable, while others may indicate a component failure.

Glossary “internal balancing” Definition:
Balancing that is done by drilling holes on the crankshaft counterweights.

Glossary “internal combustion engine (IC)” Definition:
An engine that burns the air/fuel mixture in a chamber inside the engine cylinder, like a conventional reciprocating engine or a rotary engine.

Glossary “internal gear” Definition:
A gear with teeth pointing inward toward the center of the orifice.