The initial automatic transmission to implement a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for the 1948 product year. In regular driving, the Dynaflow made use of just the leading equipment, counting on the torque multiplication with the torque convertor at lessen speeds. https://codyhklli.tokka-blog.com/34406161/gearbox-auto-things-to-know-before-you-buy