They are pretty beefy. Think of it as the 10.5" 14 bolts little brother. Shafts are bigger than a 30 spline 60, and after the splines, they get bigger to about 1.5". I personally havent seen a shaft break. I know ramstein on this board has one in his ram, and i remember him saying he tried his best to break it so he could get a 35 spline 60. I believe now, 5 years later, it is still in the truck.
Lets just say i am not worried about mine in my ram.
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