Listed are the key components and steps of operation for the speed section of the transmission.
Second speed: The planetary carrier of the forward planetary gear set, shown on the left, is driven either clockwise or counterclockwise, depending upon which planetary gear set (forward or reverse) is transmitting power. The ring gear of the second speed planetary gear set is held by clutches, while the planetary carrier is rotating the sun gear of the second gear planetary set. The second speed planetary sun gear and the output shaft rotate in the same direction, causing the planetary carrier to rotate in the same direction. Because no components of the first gear planetary set are held and are free to rotate, no power is transmitted through the first gear planetary set.