If you install them properly and do not abuse them they are fine.
I have run the lockers with side gears for years and had ZERO issues but I know of some real Animals who basically thrash their trucks beyond belief who have killed them - drive like an idiot and you WILL pay.
My advise - if you can't climb it easy then go around it. Use the locker as a traction aid and nothing more. I am growing more and more partial to the benefits of a winch every day - if you do not have one then get one.
Preserve your rig at all costs so you can wheel another day.
It is sooooooooooooooo cool sitting hard up against a rock and feeding in the gas, looking out the side and watching the wheels slowly spinning and then all of a sudden your rig hooks up and over you go - I just love it

ZeusZuki
