• The front planetary gear is integrated with the one-way clutch outer race and engaged with the drive plate of the low and reverse brake.

• The front sun gear is installed inside of the front pinion gears, and the front internal gear is installed outside of the front pinion gears. The front sun gear is engaged with the forward clutch hub, and the front internal gear is engaged with the rear planetary carrier.

• The rear planetary gear and the rear pinion gear have the rear sun gear installed inside and the rear internal gear outside. The rear sun gear is engaged with the turbine shaft via the 2-4 brake drum, and the rear internal gear is engaged with the primary gear via the front planetary carrier.

• For the secondary planetary gear, the secondary sun gear is built inside the secondary pinion gear, and the secondary internal gear is built externally. The secondary sun gear is connected to the direct clutch drum, and the secondary gear is connected to the secondary internal gear. The secondary planetary carrier is combined with the counter shaft, and also connected with the drive plate of the clutch.