Now THAT sounded like the transmission hesitating/confused when you let off the throttle just as it was wanting to upshift under load. Thats is a real issue for ANY (auto)transmission. The sound is most likely the clutches AND torque converter flipping back/forth while the controller decides wtf is happening. In this case I would agree with Ford that it is indeed “normal”. However, the software “could” be tweaked a bit to account for your driving anomalies, OR you could simply not drive in that manner. You aren't “wrong” in letting off precisely while the trans is beginning to shift, but it isn't “normally” done. It is a “corner case scenario” that can be adjusted to prevent it from happening. The dealer could do a forced “reload” of the TCM software as a first step. Good Luck!
