Most transmissions in present day automobiles use synchromesh to synchronise the speeds of your enter and output shafts. Having said that, previous to the 1950s, most cars applied non-synchronous transmissions. An automated transmission would not have to have any input from the driving force to change forward gears underneath https://gearbox98631.answerblogs.com/34012089/the-basic-principles-of-gearbox