Vacuum-operated modulator valves are installed in automobile automatic
transmissions for the purpose of controlling shift patterns. The modulator is
The modulator valve works together with the governor or throttle of your engine to
determine appropriate speeds for shifting gears. If the transmission modulator ...
Jan 7, 2016 ... Symptoms of a Bad or Failing EGR Vacuum Modulator ... If you suspect that your
vehicle's EGR vacuum modulator may be having an issue, ...
www.ask.com/youtube?q=How To Know When Your Modulator Valve Is Bad&v=ram2Ni0aUPM
Feb 17, 2015 ... Transmission modulators act as a vacuum kickdown valve which is used by ... ive
recently gotten an 89 chevy cavalier and the TCM is bad. it wont shift right, .... is
Transmission modulator or something else. waiting for your response. ... to
hardest (transmission) to determine where the noise is coming from..
Answer (1 of 4): You will be able to tell if your transmission modulator is not ...
Another way to test for a bad modulator valve is to drive your car, starting at a ...
www.ask.com/youtube?q=How To Know When Your Modulator Valve Is Bad&v=4ySIaM3gsy8
Jun 13, 2013 ... Ford C6 Vacuum Modulator Replacement ... Mustang Vacuum Modulator Valve
Threaded C4 & C6 1965-1972 Installation - Duration: 3:14.
May 19, 2007 ... Source(s): modulator valve transmission symptoms defective: ... Means bad head
gasket. ... If it's defective, your automatic trans. will not shift.
The modulator takes this vacuum signal and helps tell the transmission when to
... Transmission fluid also does a good job of cleaning out your engine, by the
way. ... This is a valve that's connected to the throttle so that the transmission
So a bad transmission modulator (caused by a vacuum leak) will ... I agree with
your logic, when the car is at WOT, there is very little vacuum ...
Very abrupt shifts: By abrupt, I mean the kind of shift that “jars your teeth.” (Note:
This condition can also be caused by a bad modulator or no vacuum getting to it.
... Some transmissions will indicate typical symptoms of sticking valve in the ...