Shift Solenoids SSA & SSB
WARNING: This page is about a different car, the 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Shift solenoids SSA and SSB provide gear selection of first through fourth gears by controlling the pressure to the three shift valves.