A gearbox is made up of gears of various dimensions, due to the different demands in times with the torque necessary for the wheels dependent upon the highway, load, and terrain, such as; climbing autos call for bigger torque than driving with a straight highway. CVT means Consistently Variable Transmission. https://jaidenbzxuq.activablog.com/32949123/the-smart-trick-of-gearbox-auto-that-nobody-is-discussing