Most transmissions in modern day automobiles use synchromesh to synchronise the speeds with the input and output shafts. Even so, before the fifties, most vehicles utilized non-synchronous transmissions. Handbook gearboxes require the continual part of the driver throughout the movement. It results in exhaustion and restlessness into the motorists. https://gearbox97418.thezenweb.com/about-gearbox-71828666