The problem with a Dana 50 is it has a Dana 44 ring & pinion. So if you go larger then 37" tires you will start breaking the ring and pinion. Even with 37" tires you will can still break the ring and pinion if you have a heavy right foot.
Incorrect. Everything in a 50 is between the size of a 44 and 60. No 44 parts. The weak point is the pinion shaft. I talked to tri county gear about it. With 35 spline shafts and ARB, should be fine on a J33P on 37s.