How does the vacuum modulator work on a Mustang?
How does the vacuum modulator work on a Mustang?
Click to expand… Via the amount of vacuum signal. More vacuum (part throttle) = earlier (lower RPM) shift. Lower vacuum (hard acceleration) = later shift point. The modulator also tells the transmission when to shift on the governor, normally only at zero vacuum (WOT).
Where is the modulator valve in a vacuum?
The modulator valve is a part of the transmission vacuum. Inside the canister of the vacuum modulator, the valve works with a diaphragm and a calibrated spring to measure load.
Where is the transmission modulator located on a Ford?
Position a jack stand under a solid section of the frame. Lower the car until its full weight rests on the stand. Locate the C4 transmission modulator at the rear of the transmission. It can be identified by a small rubber vacuum hose that connects to it. The other end of the hose is attached to a steel tube that rises up to the engine.
How is the modulator connected to the engine?
The modulator is connected to the engine through a combination of steel tubing and rubber hoses. When higher amounts of engine vacuum act on the modulator, the transmission begins to shift earlier and softer. As engine loads increase, vacuum diminishes, causing the transmission to shift later…
Click to expand… Via the amount of vacuum signal. More vacuum (part throttle) = earlier (lower RPM) shift. Lower vacuum (hard acceleration) = later shift point. The modulator also tells the transmission when to shift on the governor, normally only at zero vacuum (WOT).
What is the throttle valve on a Mustang?
Also known as the throttle valve, this valve controls vacuum to the transmission as you press the gas pedal it will apply higher control pressure for better quality shifts at higher RPM. http://www.cjponyparts.com/mustang-tr… http://www.youtube.com/subscription_c… Loading…
How to adjust the transmission modulator valve on a Ford?
You can adjust the modulator with the proper tools, equipment and basic mechanical knowledge. Park the vehicle on a firm, flat surface. Set the shifter in the “Park” position and remove the ignition keys. Place wheel chocks under the rear tires. Raise the vehicle on the passenger side using a jack.
The modulator is connected to the engine through a combination of steel tubing and rubber hoses. When higher amounts of engine vacuum act on the modulator, the transmission begins to shift earlier and softer. As engine loads increase, vacuum diminishes, causing the transmission to shift later…
