System Operation: Reverse: Powerflow
WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
In the REVERSE position, Shift Solenoid B (SSB) is commanded OFF by the PCM/ TCM to apply the direct (3,5,R) clutch. SSD is commanded ON by the PCM/ TCM to apply the (1,R) clutch. The low/reverse (1,R) clutch is applied to hold the rear planetary carrier and the direct (3,5,R) clutch is applied to transfer power from the front planetary carrier to the No. 2 sun gear. With the rear carrier held stationary by the low/reverse (1,R) clutch, the input to the No. 2 sun gear causes the rear ring to rotate in the opposite direction at a 3.128 to 1 ratio, providing reverse.