When I was having problems with my 2nd turbo, the dealer downloaded the computer info from my truck to Ford. Ford reviewed eveything and told the dealer there was an electrical problem with the turbo and gave permission to replace.
Ford will look for anything to void your warranty. Sure you can claim magnuson moss act but it will take you years to prove it. In the meantime your truck is not working or you have to spend your own money to fix.
It was very scary the info the computer logs while you are driving your truck. The downloaded log showed when I started the truck, if my seatbelt was on, how loud the radio was, how fast i was going, how much boost the turbo was making, how far the acceleration was depressed and the list went on and on.
Big brother really is watching and it's scary!