These used synchronizers to match gear speeds, allowing for for smoother shifts and less complicated driving. The mid-20th century noticed the introduction of computerized transmissions.  A handbook transmission calls for the motive force to manually select the gears[6] by working a gear stick and clutch (which is usually a foot https://automobile-gearbox30638.blogsumer.com/33348512/the-greatest-guide-to-automobile-gearbox