What is a driving gear?
In a vehicle, a driving gear is the gear which is driven by the engine. The driving gear helps control the speed the vehicle is in.
The "driving" or drive gear is the source of power or rotation. The driven gear is turned or moved by the drive gear. Example: The pulley on a motor is the drive pulley and a pulley on a pump is the driven pulley. Example: The pinion gear in a differential is the drive gear and the ring is the driven gear.