This remarkable bit of gearing has appeared on HowStuffWorks before. Chances are you'll recognize it from the electric screwdriver report. An automatic transmission has two complete planetary gearsets folded collectively into just one component. See How Gear Ratios Do the job for an introduction to planetary gearsets. You could enjoy https://gearbox-auto75284.blogitright.com/34274645/rumored-buzz-on-gearbox-auto