Very strange the luck you've had. I know John at Powertrain is a good person to deal with so you won't be left hanging. I think you're the 1st that has ever broken one of them. I was power breaking really hard with 420+ RWTorque and never had a problem... yet I was under what many other were doing without problems. Have you ever suspected the angle of yer dangle? =) kidding, yet for real at the same time. I would wonder about your drivetrain alignment, though it's something hard to spec out.