Before ford touches it, reground the TCM. I was written up by Bob Rohrman Schaumburg Ford for a whole new transmission on my wifes 90k mile fiesta to the tune of 5500 bucks. I am pretty sure they just didn't want our "business"
They never mentioned or tried to do the TCM tsb's or recalls.
I did them myself after following the youtube videos of a ford tech and the car ran fine. Wife is a nurse though and was paranoid about not making it to work so we sent it to carmax and replaced it with a CX-5. She loved that little yellow fiesta but man do I wish I had made her get a Mazda2. Tbh our fiesta didn't have much if any of a shudder/take off issue like a lot of other peoples did but we both drove it hard.
https://www.youtube.com/watch?v=eh8PIL5E_6M