i bought my genuine gear quick lock for a dana 30 front diff.  i installed it Wednesday night took it out Saturday morning.  i took my YJ out Friday the 4th, the quick lock worked for about 30 mins then it broke it wouldn't engage.  thank god for my winch.  now i have a Detroit in my dana 30.  i should have just spent the money up front and gotten the Detriot.  any questions hit me up