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Where does the vacuum hose originate from that goes to the modulator on the transmission?
Wiki User
∙ 15y ago
It's a constant source such as the intake manifold or the base of the carburetor.
Wiki User
∙ 15y ago
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How do you know when a vacuum modulator goes bad?
When the vacuum from the engine sucks in transmission fluid from the bad modulator and shows up as heavy blue smoke out the exhaust.
Where does the vacuum line from the modulator valve go to on a 1994 1500 Chevy pickup?
The factory transmission that belongs in that 94 model did not use are have a modulator valve. But to answer your question the line goes to any intake vacuum source. That year truck should have the 4L60E transmission in it.
Where does the vac-um line go on transmission?
You didn't mention what vehicle you have but in general the transmission vacuum modulator line goes directly to the engine intake manifold.
How do you change the vacuum modulator on a 1984 Ford F 250 6.9L?
The vacuum modulator is a small canister on the the side or rear of the transmission case depending on the model transmission.It is retained into the transmission by a clip that is retained to the case by screw or bolt.TO replace:Remove vacuum line from modulator, inspect line for cracks, damage etc.remove the screw or bolt holding the clip and retaining in the modulator.Inspect the new modulator to insure the "O" ring is in place on the portion that goes into the transmissioncarefully pull the modulator out of the bore in the case. At this point the transmission will probably leak some oilPush the new one in the holeRetain with clip and screw or bolt.Plug in the vacuum line
What would cause transmission fluid to be found in the vacuum line connected to the heater control?
on some cars there is a automatic transmission modulator valve that tell by vacuum when to shift gears. If that valve goes bad you will get tranny fluid in your lines.
1990 buick regal trans-axle uses trans fluid not leaking?
i would check the vacuum hose that goes to the vacuum modulator on the transmission the vacuum modulator probably has a hole in it and the fluid is going into the engine and being burned or check your coolant the radiator may have a hole in the transmission cooler inside the radiator so check your coolant and the vacuum hose for trans fluid good luck
What does a bad modulator valve do?
If the transmission modulator valve is vacuum operated and it goes bad it can allow the engine to suck transmission fluid thru the engine causing the engine to blow blue smoke out the exhaust.
Why am i losing automatic transmission fluid but the outside of the transmission is dry?
You don't mention the year , so I'm wondering if your engine oil level is going up ? I'm not a mechanic / technician but I've heard that a bad transmission modulator valve can suck transmission fluid through the modulator vacuum line so it goes into the engine
Your 93 explorer auto transmission goes into reverse but not drive what can you do?
This could indicate a simple problem with the vacuum shift modulator or a major failure with the transmission. You will probably need to get it to a mechanic or a shop to get it properly diagnosed.
How do you change the transvacumm modulator on a 1999 3.1 LS Monte Carlo?
The 1999 Monte Carlo has a 4T65E transmission that has no vacuum modulator, This transmission uses an EPC solenoid to control pressure, and commonly goes bad causing a harsh 1-2 upshift, pump whine and a check engine light with code P1811, max adapt.
Where does the modulator valve go in the 2007 automatic 4.2 liter transmission?
The modulator valve on a 2007 automatic 4.2 liter transmission goes on the underside of the transmission. You will need to jack up the vehicle in order to reach the valve.
Why is transmission fluid getting into motor - a 2.9 liter V 6 1990 Ford Ranger.?
I'm not a mechanic / technician but I read once that the modulator valve for the automatic transmission has a vacuum line connected from the valve to the engine and that transmission fluid can be sucked into the engine if something goes wrong with the valve
