-
-
Curbside Classics Archives
1938 Oldsmobile L-38 Archive
-
![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 […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2025/07/1938-Buick-Model-40C-Phaeton-Titian-Maroon-Patrick-Emzen-RM-Auctions-front-3q-left.webp?resize=115%2C115&quality=80&ssl=1 "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 | 17 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 […]
