Changed the rear diff fluid on my Jeep last month, and few small chunks of metal came out along with drain plug just covered in metallic slime. Came with factory LSD but clutch style, and they are notorious for slowly degrading or actually degrading pretty fast, especially if you don't change diff fluid. But after a week, I love it, smooth from start....and after testing it out it some deep snow, 4x4 not even needed. If anyone ever thinking of changing over with jeeps....don't hesitate. Also upgraded diff cover. Second picture is one of the chunks that came out, about 3 total that size.