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semi-automatic Archive
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![Between the development of Synchro-Mesh (launched for 1929) and Hydra-Matic (launched for 1940), General Motors also developed a four-speed semi-automatic transmission, sometimes called the Automatic Safety Transmission, which was available […]](https://www.curbsideclassic.com/cdn-cgi/image/quality=80,format=auto,onerror=redirect,metadata=none/wp-content/uploads/2025/07/1938-Buick-Model-40C-Phaeton-Titian-Maroon-Patrick-Emzen-RM-Auctions-front-3q-left.webp "Almost Automatic: SIA Drives A 1938 Buick With The Weird Semi-Automatic Ancestor of Hydra-Matic")
Almost Automatic: SIA Drives A 1938 Buick With The Weird Semi-Automatic Ancestor of Hydra-Matic
Posted on August 2, 2025 | 19 CommentsBetween the development of Synchro-Mesh (launched for 1929) and Hydra-Matic (launched for 1940), General Motors also developed a four-speed semi-automatic transmission, sometimes called the Automatic Safety Transmission, which was available […] -
![(first posted 6/19/2013) I have long been fascinated with the many stops and starts that eventually led to the automatic transmission as we know it today. We are likely all […]](https://www.curbsideclassic.com/cdn-cgi/image/quality=80,format=auto,onerror=redirect,metadata=none/wp-content/uploads/2013/06/1942-Lincoln-Ad031.jpg "Lincoln’s Liquamatic Drive History")
Lincoln’s Liquamatic Drive History
Posted on May 30, 2019 | 50 Comments(first posted 6/19/2013) I have long been fascinated with the many stops and starts that eventually led to the automatic transmission as we know it today. We are likely all […]
