2nd Gear: 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 2nd gear, SSA is commanded ON by the PCM/ TCM to apply the forward (1,2,3,4) clutch. Shift Solenoid C (SSC) is commanded ON to apply the intermediate (2,6) clutch. The forward (1,2,3,4) clutch connects the front carrier to the No. 3 sun gear. The intermediate (2,6) clutch is applied to hold the No. 2 sun gear, transferring power through the rear planetary carrier to the rear ring gear/output shaft at a 2.318 to 1 ratio.