4C Clutch
WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
The 4C clutch is hydraulically applied in third and fifth gears by pressurized fluid against the 4C clutch piston. When the 4C clutch is applied, the reaction sun gear is held or grounded to the transmission case.