Are you driving in 4wd on surfaces where the vehicle can get a lot of traction? As far as the transfer case, yes, you need to check it to make sure it is full.
If you look at the pic below, I highlighted the check / fill plug on the transfer case. Remove that plug. Fluid should be to the top of the lower portion of the threads where the plug fits. If it is low, fill it until it reaches that point.
The fluid needed is Mopar ATF +4.
Let me know what you find or if you have other questions.
Take care and God bless,
Monday, February 1st, 2021 AT 6:09 PM