Step 4: The gear set is in forward overdrive when the planetary carrier is driving the ring gear, and the planet gears walk around the stationary sun gear.
Step 5: The gear set is operating in reverse reduction when the planetary carrier is stationary, the sun gear is driving the ring gear, and the planetary gears act as idler gears.
Step 6: The planetary carrier will be in direct drive when both the sun gear and ring gear are driven at the same speed and direction.