This awesome bit of gearing has appeared on HowStuffWorks right before. You might realize it from the electric screwdriver post. An automatic transmission has two full planetary gearsets folded collectively into one particular component. See How Gear Ratios Function for an introduction to planetary gearsets. As electric powered and hybrid https://keeganpxzay.angelinsblog.com/33290828/a-simple-key-for-gearbox-auto-unveiled