ok, so recently i noticed a scraping sound coming from a wheel. i jacked the truck up and removed the right rear tire, the brake caliper(the half with the pads attached) had lost both the pins that hold it onto the other half of the caliper, and was bouncing around. i took the other vehicle up to the auto parts store and got the new pins. the problem now is, that while the caliper is secure to the truck, it rattles, it has a little bit of play to wiggle side to side, where as the left rear caliper does not. any ideas? and yes the bolts on the end of the pins are tight.