That's creepy...i thought that hex looked familiar...yep, mine is the same and an 08 model as well....but i haven't felt/heard your guy's probs.
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2008 f150 supercrew, 5.4, 3.73 LSD, tonneau cover, 275-65-18 BFG's. Gryphon programmer. XLT with XTR package. Tinted heads and tails with 8000 HID's. 4300 in the fogs. Gott's Mod. Painted grill.