gear box

Ratio-changing mechanism enclosure

A gear box is a metal casing containing a set of gears that transmits power from an engine to wheels or other machinery.

In vehicles, the gear box allows the driver to change gears, adjusting the ratio between engine speed and wheel speed: The clutch connects the engine to the gear box.

Also spelled gearbox.

Related

stick shift · synchronizers · torque converter · industrial machinery · housing · lubrication · bicycles · clutch · seals · drive trains · electric motors · robotics · power transmission · belt drives · hydraulic systems · couplings · mechanical advantage · wind turbines

Categories
Opposites
transmission type

gear boxdirect drive

Transmission without intermediate gears

CVT · belt drive · chain drive

drivetrain component function

gear boxengine

Machine producing motion

motor · power source · prime mover · differential · wheel

Family

gearbox

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G