A transmission on a truck is part of the engine and is connected to its crankshaft. Also known as the vehicle's gear box, a transmission may be automatic or manual.
A transmission sends power from the truck’s engine or motor to a drive mechanism, and converts the speed of the power source into torque. It is a unified system of shafts, gears and electrical elements that act as a link to transmit energy and power from the truck’s engine to its wheels using gears and the clutch. A transmission helps maintain the cruising speed of the truck without impacting its performance.