Forget Jasper and other "heavy duty" stuff that 4R100 is the weak spot if you are serious. I don't care how far you have to drive go to this place but you need to book and don't ask for a quote.Ignore the 'owned by coalnewbie sign' in the waiting room
Get it totally upped to a HD, as you all know, Ford made two versions of the 4R100 rebuilt automatic transmissions that are behind the 7.3L diesel engines in '99-'03 SuperDuty trucks. The OEM version, and a heavy duty version intended to compete with the BTS and John Wood rebuilt transmissions of the world. Both have the same 3-year warranty if properly installed.
If you plan to have the R&R done by Academy, you might want to pay particular attention to the Ford requirements for doing the R&R. If it's not done right, including replacing the oil-to-air tranny cooler, flushing the oil-to-water tranny cooler, and installing a Magnefine in-line tranny filter, their warranty will be void. Now when I see the Delaware Gap hill that is the killer of transmissions and with over 12,000# on my a$$ (way over) I like to see how hard I can accelerate. Coming down it's bully brake time and I still have some brakes left at the bottom instead of molten rotors. Of course, engine braking is not a new idea.
One final word, always carry a spare cam positioning sensor and a 10MM wrench and know how to change it.