After installing one of the new Rough Country halfshafts, we headed out for some night wheeling in the mud and rocks. It was a beautiful rainy sleeting night, and our big-block truck was happy as a clam clambering over a small boulder field. Then after our final run through this groomed obstacle course, the truck seemed to bog down, and felt as if the rear brakes were locked while the front kept pulling. Much to our delight we found the rear driveshaft twisted like a pretzel and snaked up along the passenger side of the truck, effectively locking the rear end from turning. Not good.