Shift Solenoids (SSA, SSB, SSC, SSD, SSE)

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

Five solenoids are used for electronic shift scheduling. The 5 solenoids are located in the solenoid body. SSA, SSB, SSC and SSD are variable force solenoids (VFS). SSE is an ON/OFF shift solenoid. Shift solenoids SSA, SSB, SSC, SSD and SSE provide selection of 1st through 6th gears and reverse by controlling the pressure of the shift valves. SSA and SSC are normally low pressure solenoids. Pressure increases as the PCM activates the solenoid. SSB and SSD are normally high pressure solenoids. Pressure decreases as the PCM activates the solenoid. SSE is normally closed and opens when the PCM activates the solenoid. The solenoids are activated by the PCM controlling current flow at the solenoid ground circuit, this is known as ground side switching.