The main automatic transmission to utilize a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 model 12 months. In standard driving, the Dynaflow employed only the leading gear, relying on the torque multiplication in the torque convertor at lessen speeds. https://gearboxauto53063.imblogs.net/83804182/gearbox-auto-things-to-know-before-you-buy