The gearbox (also called a transmission) is a huge and essential element of any auto which has a combustion engine. A hydraulic automatic transmission takes advantage of planetary gearsets instead of the handbook transmission's structure of gears lined up together input, output and intermediate shafts. CVT means Consistently Variable Transmission. https://rowanqybbb.blogkoo.com/the-5-second-trick-for-gearbox-auto-53524334