Ahhh okay so it’s just an issue of too much torque to one wheel. I was curious of what could cause a break. But other then axle shafts having too much torque applied I shouldn’t have any issue?Automatic lockers the OP's lunchbox (plus Detroit Lockers etc.) automatically unlock the outer wheel during a turn so it is free to rotate faster than the inner wheel. The issue that caused her breakage was when one of her rear tires was in the air and the other one on the rock was then receiving 100% of the torque instead of it being divided between the sides. That 100% of available torque the busted shaft received was what broke it.
Selectable lockers and "Lincoln Lockers" don't allow the outer wheel to rotate faster than the inner wheel so turns can stress them but that's not what usually breaks their axle shafts. What breaks their axle shafts is what happened to Marianne's above.
see the thing is I have the 2.5 and it’s definitely lower on power than from the factory, but in the future I plan on doing an engine swap and changing axles and doing a lot but just not the plan for it as of right now so if I can run the locker and only risk breaking an axle under very stressful circumstances then I’m fine with running it until I do the swaps I want to do in the future.