What are these problems of which you speak?
(Just back from a high-temp, well, for Michigan it was high-temp, tow of about 9500 lbs and barn-like frontal area with my 207.5K truck on the original engine and 4R100, which have never been apart at all, nor have they any reason to be taken apart.)
Seriously, most of the "problems" people have with the trans, apart from the 2001 mechanical diode, are largely a result of overloading (exceeding GVWR/GCWR) or overpowering (chip, tuner, etc.)
But yeah, heat is the killer. Ford specs say 221F max steady-state (at the sump; the pressure port everyone uses for temp senders is a reasonable surrogate), with brief (30-45 minutes at a stretch) excursions to no more than 248F, such as towing heavy up a big grade. Keep it under that, maintain the fluid per the PM schedule, and you should get good service life out of your trans.