Just swapped the axles over from one of my jeeps to the other, the front 30 I swapped in has 4:56 gearing and a locker of unknown brand. When I am on the brakes hard in 2wd on the snow, there is a terrible banging racket, but it doesnt do it in 4wd. It seems like maybe one wheel is trying to lock up and the other is maybe still turning and the locker is causing the noise? To be honest I only drove the other jeep a few times and it was summer, so I wouldnt know if it did this before. And yes both axles I swapped in have the same gearing.