The first DCT to succeed in production was the Easidrive automatic transmission released about the 1961 Hillman Minx mid-sizing auto. This was accompanied by different jap European tractors through the seventies (making use of handbook operation through only one clutch pedal), then the Porsche 962 C racing auto in 1985. https://tituslvycc.anchor-blog.com/14459612/5-tips-about-gearbox-auto-you-can-use-today