Shift Solenoid Pressure Control Solenoids (SSPC-A, SSPC-B, SSPC-C, SSPC-D, SSPC-E)
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The intermediate (SSPC-C), low/reverse (SSPC-E), and overdrive (SSPC-B) clutches are each controlled by a directly proportional variable force shift (VFS) solenoid. The coast (SSPC-A) and the direct clutch (SSPC-D) are each controlled by an inversely proportional VFS. All shift pressure solenoids are electronically controlled by the powertrain control module (PCM) which varies the current from 0 to 1 amp (direct proportional) or 1 to 0 amp (indirectly proportional).