Disclaimer, i only have 32"s.
I was in the same boat with my '99 exploder. I got a spartan lunchbox locker and ran that in the rear differential for almost 2 years with stock gears. It "slipped" only 2 times and besides that it opened up a world of opportunities of where I could go vs the stock open rear end.
It clicked pretty loudly when doing sharp u-turns but didnt bother me. It took a couple week to get used to driving it on the street but after that was very manageable.
I did some research and found that for street/desert use, a detroit locker was the best option for me.
I got it regeared and had the spartan swapped out for the robust, detroit, true locker and couldn't be happier. Quieter with no more clicking while turning and has yet to slip.
I think its pretty common with many lockers to get a loud pop every now and then which is what I get. The pop doesnt affect how the locker functions in my case. It is just a noise and I keep on trucking.