cars are not as simplistic as they used to be. now days when a car is on, its engaged or disengaged a lot of systems. when a car is off, we dont know what state it is actually in. especially with an AWD. there is a clutchpack in the rear carrier/differential and we dont know what state its in when the car is off. when a car is on, its throttle position sensor, transmission sensors, and everything else knows whats going on: is it parked. is it moving. is it coasting in neutral. is it in drive. is it slipping. etc etc.
if the rear carrier assembly/differential engaged the clutch-pack, and you dragged the car - you could have very well over-heated the clutchpack and caused issues that might or might not go away. thats why i said, let it cool down and see what happens.
the good news is you can get a used carrier with about 60k on it for around $200-$300
i believe we have the 5.173 GEAR RATIO