8.25 carrier wear

And, the side couplers that butt up against the diff carrier still rotate the same as differential when you make a turn, so there is still quite a bit of rotation going on against the housing. I don't see paying the cost for the locker just to put it in somewhere that's going to grind on it like your case. Add excess lateral slop into the equation and factor in that the amount of force of that is being transmitted through it. I can't possibly see it ending well. A little refreshment on the operational dynamics.
What Is A Lunchbox Locker And How Does It Work?