My local shop put the roughcountry 2.5" leveling kit on my 2006 fx4 and I picked it up today. When I slow down I hear squeaking (I think in the rear) and driving down the bumpy payment road it sounds horrible. Prior to this the truck made NO noise at all. I'm as non mechanical as it comes. Any ideas to what this may be???

 

Return it to the shop with your concerns first... Could have missed something during the install.