It was common inside the early 20th century for its simplicity of use compared to absolutely guide gearboxes of that point.  Compound Planetary Gearset This automatic transmission employs a set of gears, identified as a compound planetary gearset, that looks like an individual planetary gearset but actually behaves like two https://codyfebzv.qodsblog.com/33814567/a-secret-weapon-for-gearbox-auto