More Info, If You Do Not Find A Modulator, You Could Have a Different Trans. If You Have A Square Pan With 16 Bolts Then You Have A 4L60 or TH700( no modulator on these) If the pan is oval and 17 Bolts Has 4L80 ( no modulator on these) Hope This Helps You Should Have A TH400 Trans & It Does Have A Modulator.
If your transmission has a modulator it is on the side of the trans and it has a nipple on it for the vaccum line. I you. Mark
There is a modulator on some transmissions. If yours has a vacuum line going to the trans, it connects to the modulator and you simply remove the bolt holding it and pull it out.
When you get ready to run the vacuum line from the turbo 400 trans modulator to an Edlebrock Performer 800 CFM carb, attach the vacuum line for the transmission vacuum modulator to the bottom constant vacuum source or the plug that is below the throttle plate. After that, install the vacuum advance to the port that is signaled or right above the throttle plate. Once that is completed, install the large vacuum line to the back of the carb for the power brake.
the modulator valve does not have a screw, however, the modulator located outside the modulator valve may or may not have one.
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
On the back of the trans. There should be a vacuum line running to it.
on the passenger side just above the trans filter pan
the vacuum modulator can be bad. With the engine OFF, remove the vacuum line at the modulator. If fluid runs out, there's your problem.
sounds like a vacuum leak going to the modulator on the trans. check for what souns like a air leak on the small tubes going to the trans
Dodge transmissions do not use vacuum modulators.Dodge transmissions do not use vacuum modulators.
Hey George==A modulator valve is on the trans and tells the trans when to shift. If the trans gets to shifting crazy you might change the modulator. GoodluckJoe
probably the power brakes if you have them and the vaccum modulator on the tranny.
If it is an suto trans and has a modulator, the oil could be going through the modulator and burned. Pull the vacuum line off of the modulator and see if there is fluid inside of it. If so replace it.
rear pass side of trans. vacuum modulator with vacuum hose attached to end. unplug hose and remove retaining bolt and retainer clip. gently pull modulator out of trans without dropping push-pin. have new one ready. while holding finger over hole to prevent trans fluid leaking place pin in new modulator and install. make sure vacuum hose is attached and in good condition on engine end too. if trans doesn't shift still go for the governor. located under a round cover w/a bail clip on the drivers side of trans just behind shift linkage. use screwdriver to pop off cover and governor just pulls out. nylon gear on shaft likely worn out. hope this helps. jp
It is on the passenger side of the transmission towards the back of it. It will have a vacuum hose hooked to it. There will be a small bracket with 1 bolt that holds it in the transmission. Do not loose the small pin that is inside of the transmission when you remove the modulator valve. You will loose some trans. fluid.
A 350 has a vacuum modulator back at the tailshaft on the passenger side. Also the pan's shape is different.
Most likely a bad vacuum modulator or no or little vacuum reaching the modulator. Check to see if there is any vacuum going to the "can looking thing" on top of the trans. It may also be a broken or misadjusted T.V. cable going from the throttle valve to the trans. (if it has one i cant remember) Take it to an actual TRANSMISSION mechanic they cost more per hour but less likely to hear the all too common "it needs a new trans".
Yes, this really can happen. The transmission modulator ruptures and vacuum system system draws out trans fluid into engine oil thru vacuum pump into engine crankcase. Been there, done that. I replaced the modulator valve and dropped engine oil.
Never heard of a modulator valve on a caravan is it for the trans? Chrysler transmisions do not have modulator valves
A 1993 Jeep does not have a transmission modulator.
they do make a special tool called a modulator wrench just for that, but I used a pair of channel locks opened all the way with a rag around the modulator. just loosen it up and use your Hans after that.
it is located on transmission right hand side just above trans pan and covered by heat shield for exhaust.
Newer models like yours do not have a modulator on the trans; they are computer controlled. If you are having shifting problems I would suggest you change your trans fluid and filter; that should clear up shifting problems if it seems to stick in a lower gear. I hope this helps you. Mark