Welcome back. Thank you for your service. You and your comrades-in-arms are great Americans for answering the call.
Do not, at this time, have the transmission pulled, it likely isn't needed (hopefully).
Recommendation is to replace the TSS sensor. Ford part number 1S7Z-7M101-KA SENSOR - TURBI -. Dealer only (or tranny parts distributor) item. Cost should be in the low $20s. If they quote you more, ask them for a discount. I crabbed at the local parts guy when he quoted me $32 bucks, so he gave me 20% off just for asking.
There are several very good threads in this and in the Transaxle forum on replacing the sensor. If it's not corroded, it's only a 15 minute job (like mine was). If it's really corroded, it will be a real bear.
Hopefully they added RED LUBEGUARD. That's good stuff and will help extend the life of the internal friction materials if they aren't too far gone.
Good luck and let us know how it goes.
Helpful SEARCH keyword phrases "Bang shift", "TSS replacement" "TSS from Hell"
Steve