Transaxle 3-Way Shift Solenoids (SSA, SSB)
WARNING: This page is about a different car, the 2005 Mercury Montego and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The transaxle 3-way solenoid assembly (SSA) is installed on the middle valve body. The transmission 3-way solenoid assembly (SSB) is installed on the front valve body. The solenoids turn ON and OFF in response to signals output from the TCM. According to the ON or OFF status of SSA or SSB, the 1st gear engine brake operates or the gear shifts into REVERSE. As a fail-safe function, if any transmission 3-way solenoid assembly abnormality occurs, the TCM will disable the current to the solenoids.