The main automatic transmission to make use of a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was launched for your 1948 model yr. In regular driving, the Dynaflow made use of only the top rated gear, depending on the torque multiplication of your torque convertor https://gearboxauto64184.blog4youth.com/34414299/gearbox-auto-things-to-know-before-you-buy