Yeah, I put it in drive, tried pushing it, rocking it back and forth, jacked it up and tried to manually roll the wheels to get it to lock. No luck. We greased the inner caps that go ontop of the springs inside the locker to get them to hold while assembling it. That was the only thing I could imagine might have done soemthing. Upon disassembly it wasnt broken, and while disassembling I flipped it over instead of doing it piece by piece so that I didnt mess anything up or have anything fall out.