Unlike handbook gearboxes that call for handbook shifting and automatic gearboxes that choose gears dependant on many inputs, epicyclic gearboxes depend upon the engagement and disengagement of gears in the planetary system to accomplish different gear ratios. As the name implies, There are 2 clutches in motion with these gearboxes. https://dominickgmmkh.blogadvize.com/41659760/not-known-facts-about-automobile-gearbox