Shift Solenoid Pressure Control Solenoids (SSPC-A, SSPC-B, SSPC-C, SSPC-D, SSPC-E)
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 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.
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).