Thank you "G" for your input. I believe it proved to be valuable.
I took my truck back to the re-builder of the Tranny. I had specifically made an appointment for him to go on a test drive w/me driving. I explained to him my recent visits to other Tranny Shops and the outcome, went over the write-ups, and added the suggestion from these postings on the F150online Forum.
Again, making it clear that I certainly didnt want to bother him if it wasnt the Tranny - but, the consensus was = Tranny.
When I arrived at the Tranny shop, the first thing he did was place the diagnostics machine on it. I asked him not to reset the codes before going for a test drive, or it would be pointless. He said that he would not. After about 20 minutes of fiddling w/ the machine he announced that the only code he was getting was the 212:No Tach Input. He said that "the Ammco Tranny Shop was wrong about that code being insignificant". "It was the more important code". He also said that there was no "Rooster Comb" in my transmission, that I should stay off the net.
Well, we finally went for the test drive. It drove smooth. Still slipped into Neutral if you barely touched the shifter while in OD, but shifted smooth. At that point I became very upset. I told him that I believed he had reset the 628 code & thats why it was working well. The problem will continue to come back. If it wasnt the Tranny, I still need to know WHAT it is & it needs to be fixed - or It will just screw-up the Tranny again. I didnt want to have to have the Tranny re-build again in a year! Especially when these were the same symptoms I had before the Tranny re-build.
He said that he could re-create the symptoms that I described very easy & quickly. So, I asked him to do it. He got out of the Truck, went under it & fiddled for a minute, & jumped back in. Off we went & sure enough - BANG into reverse, & hard shifting. I asked what he had done create the problem. "Unplugged the speedometer". "The computer is trying to compensate for information it cant find. "In other words a lot of things can cause the issues at hand. If the computer isnt get the require information from everything it tries to make its own adjustments".
I explained, I need to have it fixed, what-ever is causing it; and I dont have the time to run back-&-forth for 6 months, trying to get adequate transportation. Keep in mind - I was very upset by this time.
He finally said, "Tea, we'll find the problem. Leave the Truck w/ me for a few days". We made an appointment for the next week, then he not only sent someone to my work to pick my Truck up, he also left me another Truck to drive (old, load, no air, gas hog - but beggars cant be choosers & I was thankful to have it).
6 days later my Truck was done. I went to pick it up and asked if the news was good. He said that they had to replace the "Rooster Comb", It had been bent. Hmmm, he said my tranny didnt have one, but I didnt push the issue. He showed it to me (looks like a ¾”x 4” piece of metal w/ a tiny roller on one end & a hole in the other). He said it was suppose to be straight. It had an obvious (about 60deg) bend @ maybe ½” from the little roller. They, also "replaced the Tack Modular on the Distributor", after the Rooster Comb was replaced they did me a favor and replace the Tack Modular (apparently not a cause of my problem).
I have only had it back since last night - so it may take a few days to establish an outcome. I isnt going into Neutral

and is shifting smooth. It is rough into Reverse (when warmed up), & I'm not sure that is a normal rough or note yet. I am a bit still a bit confused over the whole ordeal. I am hopeful though & will give a Stat. in a few days.
Thanks Again to Everyone Giving Input
Tea
