I have a 2018 SRT with 31k miles on it. Within the last few weeks, I have noticed a crazy amount of vibration and “clunking” when I reverse, regardless how hard I cut the wheel. At first I thought it was the AWD all the time kicking in and the auto just doing its thing, but it’s getting worse. Feels like I’m reversing in 4-low. Originally thought the wheels were rubbing but they have plenty of clearance. Now I’m worried it might be a bad transfer case. Any ideas what could be causing this issue?