The initial automatic transmission to implement a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was launched for that 1948 model 12 months. In normal driving, the Dynaflow employed only the leading equipment, counting on the torque multiplication in the torque convertor at reduced speeds. https://gearboxauto98517.blogozz.com/33269749/rumored-buzz-on-gearbox-auto