We have this problem too with our 2016 tt. Ours seems to be over axle. Just figured it was for that reason. Will have to look a little closer. Annoying for sure especially when someone up earlier than everyone. I try to avoid that spot. It reminds me up skipping certain stairs that creaked when I used to sneak out of house at night as teenager, lol.
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2016 Jay Feather X254
2001 Ford Excursion 6.8L V10 4.30's
Equal-i-zer 1000/10,000 WDH
Previous TV: 2004 Ford Exedition w/ heavy duty tow package[/COLOR]