Lock right. Broken a couple stubs and joints that never hurt the locker.
The detroit self destructs when the shaft breaks bc it unlocks at the immediate loss of torque and resistance due to the broke shaft.
In theory any ratcheting locker that is capable of unlocking when off throttle is prone to the same failure.
Personally I don’t like spools. I like the ability to let off throttle very briefly, locker unlocks momentarily, and then get back on throttle, makes for way easier turning( tighter radius turns). Especially useful on areas like a switchback with elevation change. With a manual it’s super easy to do this bc of clutch modulation. Not sure how it would be with an automatic?
I see the advantage of a spool bc it’s simple, but was annoying at times.
I figure if i ever destroyed the carrier/lock right I’ll pony up and get an arb. It was just cheaper for me in the past to go carrier& lock right vs full case detroit after ditching the spool