As opposed to manual gearboxes that need guide shifting and automatic gearboxes that decide on gears based on various inputs, epicyclic gearboxes count on the engagement and disengagement of gears in the planetary system to realize diverse gear ratios. An automatic transmission commonly has more than one planetary gear established. https://gearboxkeretaauto75296.ssnblog.com/31699027/detailed-notes-on-gearbox-auto