One of several handbook transmissions will be the Wilson pre-selector, released in 1930 utilised to be a planetary gear program to preselect gear ratios by working a little lever about the steering part.  Clutch Program If you utilize both clutch, an annular piston forces The 2 sets of clutch discs https://gearbox-auto29360.blogdomago.com/32713753/gearbox-auto-for-dummies