It's kind of a grinding noise. Maybe like a Brake shoe dropped. I have not pulled the rear wheels yet, but the parking brake works better then ever, and the noise sounds like its up front. I serviced the front axel, rear axel, transmission, and transfer case. all fluids are at their appropriate levels. You have to get to about 30 mph then it gets loud. loud enough that you can hear it over the cummins. I checked the driveshaft, u-joints feel tight, hanger feels tight. Any thought?

Thanks to all in advance.