Among the guide transmissions will be the Wilson pre-selector, introduced in 1930 applied being a planetary equipment procedure to preselect equipment ratios by working a small lever on the steering area.  The Gearbox presents the relative motion in between engine and driving wheels due to flexing of your street spring. https://lukasianzi.blogpixi.com/34044088/a-simple-key-for-gearbox-auto-unveiled