The input gears get the motor’s drive and rotate the output gears, which, consequently, generate the wheels. The ratio of the quantity of rotations of output gear to the quantity of rotations of enter gear is called the Gear Ratio. An unsynchronized manual transmission, normally known as a "crash box," https://ricardobgfdz.ageeksblog.com/33026511/the-ultimate-guide-to-automobile-gearbox