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Home >> Ford >> 2002 >> Crown Victoria Base, 4.6 9 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - Diagnosis - 4R70W >> Description & Operation >> Output Devices >> Shift Solenoid Assemblies

Shift Solenoid Assemblies

  1. On/off solenoids (2) are used for electronic shift scheduling. Solenoids used are Shift Solenoid No. 1 (SSA) and Shift Solenoid No. 2 (SSB). Solenoids provide gear selection by controlling pressure to 3 shift valves located in valve body. See SOLENOID OPERATION CHART  table.
    SOLENOID OPERATION CHART

    Gearshift Lever Position SSA SSB
    "P" (Park) On Off
    "R" (Reverse) On Off
    "N" (Neutral) On Off
    "D" (Overdrive) (1)
    1st Gear On Off
    2nd Gear Off Off
    3rd Gear Off On
    4th Gear On On
    "D" (Drive) Or 3rd (2)
    1st Gear On Off
    2nd Gear Off Off
    3rd Gear Off On
    2nd Gear Off Off
    1st Gear On Off
    1st Gear (3) Off Off
    (1) "OD" switch released.
    (2) "OD" switch depressed ("OD" cancelled).
    (3) Transmission is in 2nd gear until vehicle speed decreases to less than calibrated speed.
  2. When shift solenoid is always off, failure could be due to PCM and/or vehicle wiring malfunction, and/or solenoid electrically, hydraulically or mechanically stuck off. For shift symptoms, refer to illustrations. See Figure and Figure .
  3. When shift solenoid is always on, failure could be due to PCM and/or vehicle wiring malfunction, and/or solenoid electrically, hydraulically or mechanically stuck on. For shift symptoms, refer to illustrations. See Figure and Figure .
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