On the list of manual transmissions could be the Wilson pre-selector, released in 1930 used as a planetary gear procedure to preselect equipment ratios by running a little lever within the steering area.  Clutch System If you implement either clutch, an annular piston forces the two sets of clutch discs https://gearboxauto49123.spintheblog.com/34182742/gearbox-auto-things-to-know-before-you-buy