Thanks for responding. Mine is finally supposed to go in next week, assuming they have obtained the parts. In the mean time the ST continues to buck and sputter.
Please report on your next experience.
Finally getting back to you on this. So I have had two different trips to the dleaership now. One for the valve body replacement that I mentioned above and still had slipping issues after I got it back.
I took it back the second time, and like the first time, they told me they would need to contact Ford and it takes 24-48 hours for a response. While I was waiting my Ford CS person called me back and told me the tech found a bad pigtail wire. And that he was confident that this was the issue so they ordered the new pigtail and replaced it. I got the car back and it did feel different, with more consistent shift patterns.
However, let me share my test drive after picking it up. I immediately went to an open frontage road and put it in Sport mode and did 3 real hard start-stops (for lack of a better term) to test the performance and shifting. Then proceeded to drive it pretty hard and aggressively for the next two days. By the end of that 2nd day it was slipping again.
And after reading the post in this thread about these transmissions needing to "learn" the shift points (or something to that affect) I am wondering if I am causing these issues by being to hard on the car when it first gets repaired.
Anyhoo....my experiences so far and wondering if anyone has any thoughts or input. Also getting ready to go back to the dealership for visit #3.