The first automatic transmission to work with a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was introduced for the 1948 design 12 months. In standard driving, the Dynaflow applied just the major equipment, relying on the torque multiplication on the torque convertor at decrease speeds. https://zanexyxus.blogunteer.com/32796179/gearbox-auto-things-to-know-before-you-buy