spartan lockers

Ok So I have a 06 Lj with 4.88 gears and a spartan locker (2years old) in my dana 30. Was wondering if anyone else had problems with this locker? or can tell me if the loud banging sound coming from my dana 30 is my locker. Ok so for a few months I knew my axle shaft u-joint was bad, but it...

Looking on get a lunch box locker for a Dana 30 and like to heard some opinions from who uses this locker type.