The TFT sensor is located right on the filter IIRC.
I've heard from trans techs that 4F27E has valve body wear problems that are pretty common. Meaning simply changing solenoids ain't gonna do it all the time.
I have not run into it on these but my previous Contour would disable OD when a spark plug wire got bad enough and the engine performance really did not reflect it either, no missing that I could perceive. I simply changed plugs and suddenly no OD. Found out and change wires and then OD is back. I guess I damaged a wire pulling them. Wonky...........