I've been wheeling for years and never broke one. Something weaker in the line always breaks first. (u joints, axle shafts, drive shafts, etc.) My truck has the stock yoke from the original driveshaft which will have a stock-size u joint. That will be my weak link since the driveshaft is 1/4 wall and uses a rockwell joint at the other end. From what I've heard/read, it's the tcase that everyone upgrades to if they dont already have it and it's second only to an Atlas. After I wheel it for a while, I may buy a Max Low gear set for it if I feel like I need more gear. I'd like to twin stick it too!