How Do I Know If My Transmission Modulator Is Bad?

How Do I Know If My Transmission Modulator Is Bad? What does a modulator do on a transmission? The modulator valve is attached to the intake manifold with a vacuum line. It senses intake manifold vacuum and shifts the transmission accordingly: When you press down on the gas pedal, the throttle plate opens and the … Continue reading How Do I Know If My Transmission Modulator Is Bad?