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Solenoid Valve Body Assembly

NOTE: Shift solenoids SSA, SSB and SSC may also be known as SS1, SS2 and SS3.
  1. The solenoid valve body assembly contains Electronic Pressure Control (EPC) solenoid, Shift Solenoid "A" (SSA), Shift Solenoid "B" (SSB), Shift Solenoid "C" (SSC) and Torque Converter Clutch (TCC) solenoid. The shift solenoids are used for electronic shift scheduling. See SHIFT SOLENOID OPERATION  table.
  2. When shift solenoid is always off, failure could be due to the PCM and/or vehicle wiring malfunction. Shift solenoid may be stuck in off position electrically, hydraulically or mechanically. For shift symptoms, see Fig 1 .
  3. When shift solenoid is always on, failure could be due to the PCM and/or vehicle wiring malfunction. Shift solenoid may be stuck in on position electrically, hydraulically or mechanically. For shift symptoms, see Fig 2 .
SHIFT SOLENOID OPERATION

Gearshift Lever Position SSA SSB SSC
"P" Off On Off
"R" Off Off Off
"N" Off On Off
"OD"
1st Gear Off On Off
2nd Gear Off Off Off
3rd Gear On Off On
4th Gear On On On
"D" Or "3"
1st Gear Off On Off
2nd Gear Off Off Off
3rd Gear On Off Off
"2"
2nd Gear Off Off Off
3rd Gear (1) On Off Off
"1"
1st Gear Off On Off
2nd Gear (1) Off Off Off
3rd Gear (1) On Off Off
(1) Transaxle will not downshift from higher gear until vehicle speed drops below calibrated speed.
Fig 1: Shift Solenoid Always Off Failure Charts
G00025105Courtesy of FORD MOTOR CO.
Fig 2: Shift Solenoid Always On Failure Charts
G00025106Courtesy of FORD MOTOR CO.