I have noticed that if I am going 30mph my rear end will start making some loud gear noises when I let my foot off the gas. It gets louder the faster you go. At first I thought it was the third gear in the tranny because it only did it in that gear but on the freeway today I pushed in the clutch at 60mph and sure enough, it started making noise. So it does it coasting over 30mph. Some history: 12 bolt 3.73 35's 465 208 New u-joints I pulled the yoke off the 12 and put it back on without torquing it back on. Maybe that caused a problem. A couple of the teeth on the ring gear had some pitting but no broken teeth. It also has oil. I have never run this gear ratio with such big tires on such a heavy truck so foe all I know this might be normal, but I doubt it. What do you pro's think?