This has happened twice now. My car is a 620hp 03 Cobra with a SRA. I have 31 spline moser axles, TA Girdle, trac-lock posi, and 3.73s. The suspension consists of MM Extreme duty lowers, steeda double adjustable uppers, lakewood 50/50s, and welded torque boxes. I have broken the welds on the driver side axle tube twice now and I cannot figure out why. I will be taking the rear end out tomorrow and I will post some pictures then. Here is a picture of it before it went into my car. I have had the rear end built by a very reputable guy here in town and he has never seen anyone do it twice before either.