The very first automatic transmission to work with a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was released for your 1948 design calendar year. In normal driving, the Dynaflow employed only the prime gear, depending on the torque multiplication of the torque convertor at https://gearbox-auto96394.dm-blog.com/34164722/facts-about-gearbox-auto-revealed