Shift solenoids A through D are VFS that vary hydraulic pressure by actuating a hydraulic valve.
The PCM applies variable current to the shift solenoids which varies pressure in the hydraulic circuit to the regulator and latch valves of the clutch that it controls.
SSA and SSC use proportional operation. As the current from the PCM decreases, the pressure from the solenoid decreases. As the current from the PCM increases, the pressure from the solenoid increases. SSA and SSC are supplied hydraulic pressure from the SREG circuit.
With zero current, SSA and SSC fully close the hydraulic valves which applies zero amount of hydraulic pressure to the regulator and latch valves of the clutch that it controls and releases the clutch. With maximum current to the solenoids, the hydraulic valves fully open for maximum pressure to the regulator and latch valves to apply the clutch.
Shift Solenoid B (SSB) and Shift Solenoid D (SSD) Inverse Proportional Variable VFS
Item | Description |
A | Low Current |
B | High Current |
1 | Low Exhaust |
2 | SREG Circuit Fluid (Supply) |
3 | Low Pressure To Clutch Regulator And Latch Valves |
4 | High Exhaust |
5 | SREG Circuit Fluid (Supply) |
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.