Diesel Bombers - 47re won't downshift?!

Well guys I have a built 47re. At the time I had it built I didn't have the money to put a vb in it so I left it stock. It pulls great however im having an issue thats really getting irritating :argh: . It wont downshift, never has sense the day I bought this truck.

When slowing down it wont downshift till I come to a complete stop and it drops straight to first kinda hard :scare2:, or on the highway if I go to mash on it hard it won't downshift a gear and grab some higher rpm's, wont do it when hauling either witch gets really rough when you need those higher rpm's of 3rd gear on a hill and it won't downshift for you.

So for the past week I have just been shifting down to second on my own to help me slow down a little without burning up my brakes. Today all of a sudden it started downshifting, did it a couple times, then it started doing this thing where it would downshift and then a second later shift back up and keep doing that till I came to a complete stop (it has done this before, the day before the transmission went out :humm:, coincidence maybe). I do have a TC lock up switch, hardly ever use it, and I do have a jumper wire in place of the relay.

I have heard lots about the governor sensor and solenoid going bad. Do you think this is my problem? Id really like a new vb but don't want to blow my savings on that just right now. Any ideas what else it could be? Maybe a bad transducer? Any help would be really great, im doing a fluid change soon and it would be nice to fix this problem while im in there!

Im ordering my Transgo shift kit in a couple days (blowing some tax money). That should help it to, if my problem is a governor sensor and solenoid should i order those as well along with the shift kit?
I know there is lots of talk about this on the forum, however my symptoms seem a little different from others.

Thanks!