This awesome bit of gearing has appeared on HowStuffWorks ahead of. Chances are you'll identify it from the electric screwdriver short article. An automatic transmission is made up of two comprehensive planetary gearsets folded jointly into one particular element. See How Gear Ratios Function for an introduction to planetary gearsets. https://gearbox-auto10851.theobloggers.com/40407987/5-simple-statements-about-gearbox-auto-explained