It can be sort of funny with posts on these boards with how people comment and react. Like emails things can be read into written words that maybe were not there, or were not meant to be read that way. Other times people should pause a minute before posting something, especially when it is more of a personal view and not always fact. Sure people have brand preferences and in most cases that is their view, but should not be pushing that upon others. Needless to say most of us on this site have a brand preference for Ford, or well at least the Raptor, otherwise we would not be here.
Okay, back on the topic just because one person has a trans which does not heat up, does not mean it is in the same conditions as others. Big difference between running at speed in one are say compared to running slower in another. Like say sand, lower tire pressure, a lot harder on the transmission then higher speed on flat ground, or even somewhat hilly.
With regards to transmission fluid, many companies make good quality products. Sure some may be better than others depending on the intended application. Transmission fluid is the most complex of all fluids in the vehicle. It must be able to cool, protect, lubricate parts of the transmission but also allow a certain amount of friction so the clutches and bands can engage correctly. It used to be easy, 2 to 3 types covered almost everything, but now it is crazy and the main thing I would recommend is don't use anything that says it is universal. Part of the reason is the difference in viscosity of these fluids now. But at the end of the day, these are just my opinions.
They ended up replacing the transmission thermostat and check valve. So now that it's fixed it's time to get back out and play again. 
