Automatic Transmission Modulator Valve

The automatic transmission modulator valve is a vacuum-operated valve installed in the case of the transmission.

Transmission modulator valve importance

The modulator valve is a vital component that contains various parts like the throttle valve, pushrod, and spring. The modulator valve has the task of controlling the shifting in an automatic transmission. Nowadays, the modulator valve cannot be found in modern transmissions because they are meant for older transmissions. The valve is linked to the manifold with a vacuum line, detects the intake manifold vacuum, and shifts the transmission when you depress the gas pedal.

Common issues with a defective modulator valve

A malfunctioning modulator valve can lead to difficulty shifting, rough idling, or abnormal noises.