The initial automatic transmission to work with a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 product year. In standard driving, the Dynaflow made use of just the prime equipment, relying on the torque multiplication with the torque convertor at https://gearboxauto96395.theblogfairy.com/33298895/top-guidelines-of-gearbox-auto