These utilised synchronizers to match gear speeds, enabling for smoother shifts and less difficult driving. The mid-20th century observed the introduction of automatic transmissions.  Contohnya ketika menuruni bukit Cameron Highland atau Lebuh Raya Timur Barat (bukit Gerik) dengan gear D, keadaan bukit yang curam membuatkan kereta macam nak terlajak ke depan, https://gearboxauto95947.blogdun.com/33121656/helping-the-others-realize-the-advantages-of-gearbox-kereta-auto