I have a recurring problem. Back history, I bought a 2012 JK MP241 transfer case for my doubler, first drive out it got stuck in neutral. Found out that the range fork was severely worn. Rebuilt those parts, and my low range wouldn't stay engaged. Pulled it back out, it was out of alignment and the range hub was riding on the planetary in high range. I replaced almost all the parts from another case. Worked great, for about 400 miles, and it has failed again. (I haven't pulled it, but it popped into neutral and had to tow it home). Here are pictures from the previous times. Any ideas why this is repeatedly happening?