Gearbox

Pronunciation: /ˈɡɪrˌbɑːks/

Gearbox (noun)

  1. A device in a vehicle that changes engine speed and power to the wheels.
  2. A mechanical unit that transfers power between parts using gears to control speed or torque.

Examples

  • The gearbox changes the car speed smoothly.
  • A driver relies on the gearbox to shift gears.