I am lost. I have a squeaking sound coming from the front and rear of my truck. I don't hear it unless I am driving across uneven ground or hitting bumps. If I am on flat ground it isn't there. Its obviously something in the suspension or drivetrain part of the truck, but I can't figure out where it is coming from. Its a really high pitched squeaking, like the sound styrofoam makes when it squeaks. Any help is much appreciated.