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the modulator valve does not have a screw, however, the modulator located outside the modulator valve may or may not have one.

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โˆ™ 2006-03-05 03:39:04
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Q: Which way do you turn the screw on modulator valve On a 350 turbo trans to make it shift quicker on low vacuum?
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How do you adjust a vacuum modulator?

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.


Does the transmission have a modulator valve?

as far as I understand , it does not have a modulator. e4od are electronic. no vacuum shift modulator


What is 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.


Why does my Automatic will only shift manually?

Could be no vacuum to the modulator.


What is the function of a modulator of car?

Assuming you mean the modulator on an automatic transmission... The modulator help to control the timing of the changing of gears in the tansmission. The modulator uses manifold vacuum to finetune the shift point, lower vacuum means higher load, throttle is open wider, shift point will be delayed.


Where is the vacuum line running to the transmission in a 1994 camaro Z28?

It's for a modulator valve. The later cars all shift by electronics and signals from the ECM. Yours however still uses a modulator valve and vacuum to assist in determining shift points.


Were is the shift modulator located on a Chevy Celebrity v6?

On the 440T4 Automatic Overdrive transaxle the modulator is on the front of the case, A vacuum line leads to it from the intake manifold.


My 79 firebird wont shift by itself. i checked the fluid while ideling and chased down my vacuum hoses and that's not it either. maybe modulator valve?

I had this problem on a car once. If it won't shift by itself, but it does shift when you go through the gears manually, it's the vacuum modulator. Replace it and you'll be good to go.


Where is the shift modulator located on 98 jeep Laredo?

A 1998 Jeep does not have a shift modulator.


What is wrong with a 1987 ford F150 if it starts to shift at a very high rpm?

I would start by looking for worn vacum line to modulator. Or the modulator could be bad. the modulator is located on the transmission which tells the transmission to shift when the vacum pulls a diaphragm inside the modulator a certain distance. some are adjustable with a flat blade screw i believe.


Why would a 1995 Suzuki Sidekick down shift from 3rd to 2nd way too easily if a cable controls down shift points on the automatic transmission then what does the modulator valve do?

cable is demand vacuum modulator is vacuum which translates to LOAD> last is governor ,and this is speed bases (rpm at tail shaft) how is that.


How do you adjust a 350 trany?

There is no adjustments to a 350 Turbo Transmission (GM). The only external thing that would cause shift problems is the vacuum modulator on the side. This is replaceable easily. Check for proper vacuum signal to the modulator. Make sure there are no holes and or kinks in the vacuum line from the engine to the modulator. If none is found, replace the modulator for shift complaints. If it is slipping, the tranmission will require removal and overhaul. This transmission uses wet clutch plates and automatically compensates for wear in the plates to a certain point.


Does an electric transmission have a vacuum modulator?

No. It relies on the computer and sensors for shift points, firmness, etc. IF it has a vacuum modulator, it likely i s a backup device to get it home in case of electronic failure (which usually means the vehicle won't run anyway)


Does a Dodge Dakota 4x4 have a vacuum modulator and does it make the trans shift smooth?

Dodge transmissions do not use vacuum modulators.Dodge transmissions do not use vacuum modulators.


Shift modulator valve on 1999 Buick regal?

the 4t60-e transmission uses a shift modulator that can be found at most auto part stores. however i believe the '99 regals use the 4t65-e transmission which are not vacuum operated therefor to up the shift pressure you will need a tuner or a shift kit.


How to replace a modulator valve on 1995 buick riveria?

located right on front and top of transmission. Just below and to the left of the airfilter housing. Just follow the vacuum line from front top of intake, right down to transmission, driver side. Pretty easy to find really. Screw it out, screw new one in. Why do you want to replace the modulator valve? I believe this is a electronic shift transmission


Your 1991 Lincoln town car will not shift out of first gear?

If a 1991 Lincoln Town Car will not shift out of first gear, the car should be checked for a vacuum leak. Another item to check is the vacuum modulator which is next to the transmission.


Where is the shift sensor or vacuum modulator on 1995 Pontiac Bonneville?

evidentually it is a big secret. They will only tell you where to go to buy one.


Where is the vacuum shift modulator on a 1989 Chevy blazer?

It is right behind the right headlight under the battery box attached to the inner fender.


Where is the shift modulator on a 1996 Chrysler located?

Chrysler does not use modulator valves.


What is function of modulator valve?

The modulator valve uses hydrological pressure to shift a transmission !


Why wont your transmission shift while im driving?

check your fluid level. check for a vacuum leak on the tranny modulator valve.Without knowing what kind of vehicle that is about it.


The transmission on a 94 explorer was replaced put it doesn't go into overdrive?

Overdrive is controlled by the shift solenoid, and vacuum modulator. the kick down you refer to is not overdrive but passing gear and should also be controlled by vacuum.


Dose the breather vent have to be hooked up on a 350 turbo trans?

breather vent on top of tyranny is open to air the only vacuum hose that's hooked up is shift modulator to constant vacuum on manifold


Car sounds like it is stuck in wrong gear?

if this is an older type car they use to have a vacuum modulator on the transmission that helped shift. It has a diaphragm in it that breaks and keeps it from upshift.