These made use of synchronizers to match gear speeds, permitting for smoother shifts and a lot easier driving. The mid-20th century observed the introduction of automatic transmissions.  Ini adalah sistem transmisi automatik pertama di dunia yang berfungsi tanpa klac guide. Hydra-Matic menjadi kegemaran di Amerika Syarikat, dan dalam dekad 1950-an, https://gearboxkeretaauto99864.glifeblog.com/31595468/how-gearbox-kereta-auto-can-save-you-time-stress-and-money