Ford cheap dealership rebuild. Whatever they did - didnt work. PLUS I had a transaxle pull loose from the transmission. I got lucky, back then when Diablo Sport was its own company down here HQ in Boca Raton, I loaded their "dyno" tune. I didnt know the computers in our car kept the recounts for updates, however was very fortunate to complain that I had a rough idle from day one, so their techs kept reloading the tune from Ford. So it covered up my flashing.
I meander in my thoughts, so I had open tickets with Diablo at the time, I had really rough shifts with their tune, (felt like they were slamming shifts) and truly believe it lead to the demise of my transmission. One of the asks from my current tuner - lets not push the transmission - stay in the safe ranges. I dont have any tracks near my home any longer - only one closed down to street racers.
I lodged and opened a ticket with Ford corp - complained I wanted a regional repair manager to look into replacing my tran, and got one from Detroit.
It has been solid since - however I have ZERO faith in Ford dealership repairs, I would find a reliable shop that knows and works on Ecoboost - or turbo engines. However I do know many cars are turbo charged nowadays.
PS - SO to answer your question what happened to my rebuild.... I am very friendly with a local shop that a couple of us use locally. I was told that the guys doing warranty work - DO NOT get paid the same as doing non warranty work. So my guy who had to rip out my transmission and replace parts - wanted to "get it done" and get it out the door. He/She could be making more money on non warranty work. It is the narrative I like to believe.