These made use of synchronizers to match gear speeds, making it possible for for smoother shifts and simpler driving. The mid-twentieth century saw the introduction of automatic transmissions.  Computerized gearboxes eliminate the need for any clutch pedal, which disconnects the motor through the transmission so that you can transform gear. https://brooksxfjlj.bleepblogs.com/34604848/not-known-details-about-automobile-gearbox