Cars have to have gearboxes to deliver distinctive equipment ratios for productive electric power shipping at distinctive speeds. The General Motors Hydra-Matic became the 1st mass-manufactured automatic transmission following its introduction in 1939 (1940 design year). Accessible as a possibility in autos like the Oldsmobile Collection 60 and Cadillac Sixty https://keeganscimp.activosblog.com/33116701/gearbox-auto-an-overview