Input Shaft: Description and Operation

The input shaft front end is spline-fitted to the torque converter clutch turbine hub. The rear end is spline-fitted to the high clutch drum and rear sun gear. Power from the torque converter clutch is transmitted to the high clutch drum and rear sun gear. The input shaft is hollow. A seal is fitted inside the shaft by a roll pin. The torque converter clutch side of the shaft becomes the drain circuit for the lock-up mechanism. The other side becomes the lubricating circuit for the planetary gears and high clutch.