The primary automatic transmission to utilize a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for your 1948 product 12 months. In regular driving, the Dynaflow used just the top rated equipment, counting on the torque multiplication in the torque convertor at reduce speeds. https://gearbox-auto53074.blogthisbiz.com/40440072/rumored-buzz-on-gearbox-auto