gear box
Noun
Meaning
the shell (metal casing) in which a train of gears is sealed
Source: WordNetAlternative names
gear-box
Synonyms
Hypernyms
Examples
Both HMMWV copies rely heavily on imported U.S.-made parts, including the chassis, gear box, and diesel engine.
This can be a traditional gear box, coaxial planetary gears or a transmission with belts or chains.
Put the stuff in it that I lost because it is a manual gear box.
These work superbly with the Tamiya dual gear box.