Vacuum Modulator Valve C4

[umc276]

I have a '76 Bronco 302 with a C4. I am replacing modulator valve on transmission and the Ford dealer has 3 color codes listed. He says I must match up color to the old one to get correct replacement. Of course after 30 years there is no color left on the old one. Autozone lists black stripe type which doesn't work properly.

Does anyone know correct color code for this Bronco.

Thanks.

 

[Broncobill78]

Not sure off the top of my head but you might want to consider an adjustable modulator, that way you can just adjust it until you're happy with the shiftpoints.

 

[umc276]

My old one was adjustable and I was happy with the way it shifted. But the adjustment range is minor and you need correct range modulator or it won't work. The black stripe listed at Autozone was completely wrong ( very late 1-2 shifts, downshift from 3-2 at slightest touch of accelerator).

 

[76Explorer]

My old one was adjustable and I was happy with the way it shifted. But the adjustment range is minor and you need correct range modulator or it won't work. The black stripe listed at Autozone was completely wrong ( very late 1-2 shifts, downshift from 3-2 at slightest touch of accelerator).

My 76 uses the green stripe with a single port.

 

[STLKIKN]

My C-4s both have green stripe mods as well.

 

[umc276]

Thank you. I exchanged the black stripe for green and it now runs just as before.

Autozone part # MV317 or MV209 $9.99