Physically, the parts on a dana 30 are SMALLER than on a dana 35. The axle shafts in a dana 30 will break at the same loads or less than a dana 35. But because it is on the front end where loads are less, it survives much better than the dana 35. Also It is a full float (no c-clip) setup, so the axle shafts arn't taking much load. If you were to put a locker in it and drive up the same place where you broke your dana 35, but backwards. It would grenade itself just as well.