The continually variable transmission (CVT) is strange in that it doesn’t make use of a series of cogs for gears like a traditional gearbox. Alternatively, it works a little just like the gears in your bicycle. The torque converter is the most common variety of gearbox within an automatic transmission, https://gearbox-auto03680.mdkblog.com/39622648/the-definitive-guide-to-gearbox-auto