Whats going on! I went offroading a few weeks ago and afterwards I have been hearing a rattling sound comming from under the truck. It sounds like a baseball card in bike spokes. The weird thing is that it only happens when I first start up the truck and seems to go away by the time I hit third gear on my way out my neighborhood. It also does not happen everyday. My truck is bone stock and I was just wandering what this noise can be.