Several people have reached out to me including a Ford transmission shop owner that says all the '14s 6r80 are coming back with this fault. People reading this can be saved. It is no joke when your rear wheels lock up going down a highway doing 60mph in the rain. I have my proof. This will kill several people and when power is turned off the faults disappear. I have video of it. Ford should have recalled not service bulletin.
“All of the 2014s are coming back with this fault”?
So these are vehicles that were unaffected by the lead frame issue, and this guy has millions of F-150s, Expeditions, and Navigators lined up in his parking lot? Please stop with the dramatizations, you lose all credibility when you make exaggerated and outrageous claims.
There is no proof of anything thus far because you never had it diagnosed. The entire thread has been you assuming that your vehicle, which was built outside of the recall build dates, has a defect that does not pertain to it. Vehicles built after the cutoff have the new calibration that will not cause it to downshift unexpectedly even if the lead frame were to have an issue and lose the speed signal.
You stated that the transmission was rebuilt 20k miles ago by the dealership. That is where you need to start; it needs to be a torn down to determine what component failed and caused it to lock up.