It’s one thing to avoid home repairs on a transmission, but gears and the inner workings of modern gearboxes are too interesting to ignore. Planetary gears fall into this category, and as a ...

most automobiles use a form of automatic transmission called a hydraulic planetary automatic transmission, which is also used in a scaled-up version in some industrial and commercial equipment and ...

The torque carrying capability of a planetary gear (also called torque density) can be increased by adding additional planet gears. That said, there is a limit to how many can be added.