Anyone ran a TH400 with a vacuum modulator valve?

[randymc1]

How do you get it to shift at w.o.t. ? Mine won't! Do I have to a manual valve body!

 

[crazygn]

where do you have the vac line going . I have the line on my th350 with a T in it and a one way valve on it so it cant get any boost , with out it it just wont shift on mine.

 

[randymc1]

Tell me more about this one way valve! My line is run straight from a t at the map sensor. I know the way I have it is wrong. So how do i make it work? Where do I get this one way valve? Be very specific please. Any help greatly appreciated. Randy

 

[Red Regal T]

I guess "CrazyGN" is talking about those little plastic vacuum check valves you'll see under your hood. I'm sure any autoparts store has them with the right nipple size for your vacuum hose to the modulator.