By compared the three locker test data from ARB manufacturing here's the list.
ARB: axle broken at 6900 ft-trq. No locker damaged.
China air locker: 6500 ft-trq. gears and piston damaged only.
Yukon zip locker: 6200 ft-trq. Case, gears, cross shaft and piston damaged.
Not to bash on anyone products. Is what i got from the person who tested. Just trying to fine a cheap and still reliable locker. So what do y'all think?
Link to tests:
http://www.youtube.com/watch?v=dyzyAVPTM8c