The initial automatic transmission to employ a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was released for the 1948 design 12 months. In standard driving, the Dynaflow utilised only the major equipment, relying on the torque multiplication from the torque convertor at lower speeds. https://gearbox-auto32963.dgbloggers.com/34228321/how-much-you-need-to-expect-you-ll-pay-for-a-good-gearbox-auto