how do you know if the modulator valve is bad on a 72 ford pickup? What are the signs...

bigboy

New member
...of a faulty mod valve? What are the signs of a faulty mod valve?
Thanks everyone. Also it runs fine in reverse. It does nothing in drive or 2nd but if you put it in 1st it will go alittle sometimes but not much.
 
Trans Modulator?

when it goes bad, it stays in first gear..also check the vacuum line to the Modulator valve. If it is broken it wont work...it`ll just stay in first.
 
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