Originally Posted by MaineCedes

Okay, I now know what to do with the EGR. But here goes my confusion again...
Does the 3/2 valve have nothing to do with transmission shifting on a 1981 300? Is this valve only associated with the EGR? I was planning on replacing the two springy valvy things on this unit per Diesel911 as mine are VERY worn out. But if they have nothing to do anything but EGR, I won't bother... More confusion.

How do I eliminate vacuum to the 3/2. if in fact that is also necessary.

Thanks,John