I broke a 55 axle once "just driving around". Weldies put so much strain on the whole drive train, not just the axles. If the axles were somehow super strength, you'll just end up blowing out spider gears.... or maybe a gearbox instead. Yep, I've done both of those too. Haven't run a weldy since. And you know what... I now put 180rwkw through a stock ke55 diff and life is peachy. Just my 2c.