Holy long threads batman!!
Ok so, I'll chime in as an owner of a bone stock(except for mufflers) 2011 GT. None of the suspension components have ever been touched on my car outside of making sure they still exist during oil changes and I have had this problem since the day I brought the car home. I mentioned it to my dealership during every oil change while it was under warranty and I got the 2 standard responses: "We can't duplicate your problem" or "Yup, it's doing it, but Ford doesn't recognize the existence of the problem so you're SOL". These are always followed by "the cashier has your keys, see you in 5,000 miles" as I climb back in my otherwise brilliant car and wobble on down the road. I even went so far as to have the service manager ride with me to prove the problem and ask for his help: again I was told that I was Sh*t outta luck if I expected them to do anything about it.
I have nearly 60,000 miles now and the car has been reliable and without a hiccup in every way, except for the steering shudder and some minor gripes getting used to the MT82. I tried having the dealership look at it again recently, since I had a different customer service agent handling my car, but was greeted the next day with a phone call telling me it would be $90 for them to even think about it now. I politely declined and again, picked up my wobbly car and drove off.
Perhaps someday I will have a spare thousand bucks lying around and will get a new rack, but those chances are pretty slim. Until then I'll enjoy my car and shake my head at how pathetic it is that a company can allow such a thing to go on every time I get that familiar and under hard braking, terrifying steering wheel shudder. Steering and transmission; what a place to cut corners....