evidentually it is a big secret. They will only tell you where to go to buy one.
To change the transmission modulator valve in a 97 Pontiac Bonneville you will first need to lift the vehicle off the ground. Then, remove the vacuum hose and the defective valve. You can then replace with new, and replace the hose.
The 2000 Pontiac Montana does not have a vacuum modulator installed on it. Instead, it has an electronically controlled transaxle.
2001 Montana has an electronic transaxle. There is no vacuum modulator. The 2001 Montana has an electronically controlled transaxle. There is no vacuum modulator.
The transmission does not have a vacuum modulator.The transmission does not have a vacuum modulator.
The transmission on a Chrysler Sebring does not have a vacuum modulator.The transmission on a Chrysler Sebring does not have a vacuum modulator.
The transmission in a 1991 Chrysler does not have a vacuum modulator.The transmission in a 1991 Chrysler does not have a vacuum modulator.
On some of the older vehicles the vacuum modulator controlled the shift points of the transmission by using the vacuum supplied from the engine.
I assume your refering to the vacuum modulator which controls transmission shift points. Remove the vacuum hose from the modulator. Using a small screwdriver, turn the screw inside the modulator. It may take several tries to get it right.
There should be an o-ring where the modulator is inserted into the transmission. There should be no fluid where the vacuum line attaches, if so the modulator is bad.
A vacuum modulator is used to apply pressure to the throttle valve. The modulator senses the pressure from the manifold and increases when the engine is under a heavier load.
as far as I understand , it does not have a modulator. e4od are electronic. no vacuum shift modulator
If a vacuum modulator has fluid in the vacuum port, it has failed and should be replaced.