Originally Posted by JimZ

My shifting got a little hard after I did a valve adjusment over the weekend. When I checked my vacuum lines I found that one of the vac lines going into the black box was unplugged. When I plugged it back in it broke, so I bought some more line. I unplugged the other line when I was putting the new one in, and I couldn't remember which line went in which hole. Blah blah.

Point is, I was getting hard shifts with one of those lines unplugged at the black box. But that was probably because it was leaking out. I can see it being unecessary, but if you don't seal off the T, your transmission will probably shift weird, right?

Also, besides the three vac lines that go into the black box, there are a few more holes with nothing going into them. What are they for? Two of them, in my car, have screws screwed into them. If there are no vac lines going into that box, should the black box holes be sealed with screws or something?