With everything in neutral, Jeep starts fine. I shift the transfer case into 4H (transmission still in N) and again, all good. As soon as I move the shifter from N however, there is the most horrendous grinding noise, even if I go straight past R into P. If I shut down the car and start it back up again, grinding stops and I can shift between P R N D without issue until I put the transfer case into N and back into 4H again. Thoughts on what the hell is wrong? Transmission is a 32RH on a 98 TJ with a fresh flush and the correct ATF +4 level (as checked in N).