On the road traveling and my rear differential is making a noise when under load. Think the pinion nut has come loose from a recent pinion seal replacement. Currently located just east of Dayton OH and looking for a good repair shop. Truck is still drivable, just have to take it easy on the throttle but I know I'm slowly damaging the gears. Hopefully a shop that can work on a box truck since I carry a truck camper and don't want to remove it. Any recommendations is greatly appreciated.