2011 FX4 with 3800 miles on it, the rear end is super creeky. Is anyone else having this issue?. The truck will be headed into the shop soon anyways for a blown speaker from the factory along with a rattle in the driver door and last but not least an oil change.

 

I have a 2010 f150 with the same creek, only mine only occurs when going over speed bumps or I would guess articulation at about 5-10 mph. please post up what the dealer says.