The lock right locker is a pretty noisy unit, I have one in my daily driver Cummins powered Dodge W250. As far as being strong, it's held up so far and I don't baby it. It seemed to take a while to "wear in" where it would unlock quite often going around a corner. After about 500 miles it has calmed down a bit but still unlocks occasionally going around a corner. One time it must have unlocked both sides at once because it clanked so loud I thought I broke something, I had to jack the truck up when I got home to make sure one of the axles wasn't snapped in half.
Oh and with 3.55 gears in a dana 70 I had to pull the carrier and take the ring gear off to install locker unit, it wouldn't clear the ring gear going into the differential.
I think for the money one of those locker costs I'd just put some type of limited slip differential in it, they're a little more street friendly.
