Cobra diff we did yesterday. In spite of low miles, carrier bearings shedding bits which went through rest of the unit taking out gear set as well. Adding to the original problem, either pinion or bearing defective, bearing not close to fitting snug enough on the pinion n slid off with relative ease. Good news part, fresh set of 373s combined will all new bearings and seals n topped off by an uber sweet Torsen T2R. Dropping it back in this am, will make this sweet Cobra quiet.