This astounding bit of gearing has appeared on HowStuffWorks just before. You could possibly recognize it from the electric screwdriver write-up. An automatic transmission is made up of two finish planetary gearsets folded jointly into one component. See How Equipment Ratios Do the job for an introduction to planetary gearsets. https://shaneisxza.izrablog.com/34647348/top-guidelines-of-gearbox-auto