I hate to start an argument with a Moderator when I'm the new kid on the block but lets say that it is a tolerance issue and the fluid is gold until it overheats. Then that leads me to the question if why is it overheating under normal operating conditions? Ford is still at fault for a bad design right? They need to engineer it so that it withstands standard use. Whether that requires a different air foil design to cool the unit, different fluid to withstand the heat or completely different components; it was still their responsibility. If this were a rare case where a 22 year old was using his AWD edge in an 8 hour rally race and burned his PTU that argument would be valid, but not when its this common among the average users its hard to not start pointing a finger at Ford.
I agree, only an idiot would do something that costs them a lot of money in repairs... such as admitting fault and having to repair hundreds of thousands of cars? Corporations have time and time again stepped on consumers to their benefit. Martin Shkreli, Wells Fargo, VW emissions are a few recent ones that come to mind. Ford may not have initially tried to push a product that was crap but sure havn't stepped up to address it!