It had been common inside the early twentieth century for its ease of use in comparison with entirely guide gearboxes of that time.  The gear ratio may be the ratio concerning the input and output gears. The driving gear and driven gears within a gearbox define the equipment ratios. This https://claytonqxxwt.ageeksblog.com/33026060/the-smart-trick-of-automobile-gearbox-that-no-one-is-discussing