The primary automatic transmission to utilize a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for your 1948 model yr. In typical driving, the Dynaflow employed only the major gear, counting on the torque multiplication from the torque convertor at lower speeds. The Dynaflow https://gearboxauto99651.blogdigy.com/a-review-of-gearbox-auto-51123233