The very first automatic transmission to work with a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was released for your 1948 design year. In standard driving, the Dynaflow made use of only the prime gear, counting on the torque multiplication of your torque convertor https://jaredimnlj.blogsuperapp.com/34716581/the-gearbox-auto-diaries