Hydraulic Fundamentals: AFL/Solenoid Modulator Valves
Knowing your transmission’s hydraulic circuit — and solenoid circuits in particular — can be very helpful when identifying the underlying cause.
Double Trouble
In today’s world of automatic transmissions we see several different types of solenoids being used depending on the strategy the engineer chose to employ. There are the typical on/off solenoids that could be normally closed or normally open. And then there are PWM solenoids, normally applied or normally vented.
