Vehicles require gearboxes to provide unique equipment ratios for economical electrical power shipping and delivery at diverse speeds. It's an epicyclic gear arrangement. As the figure demonstrates the front watch and facet view of the gearbox. This gearbox type, has a few gears Sunshine gear, Earth gear, and ring equipment. https://reidikhdx.like-blogs.com/33926169/the-definitive-guide-to-automobile-gearbox