[papassater]

sometimes will be in park and rolls while in park.
Truck on ground in drive and won't go. Grinding in transfer case.
Pops out of gear when driving now. Don't know if any codes or messages as cluster is completely out.
Just asking what problem is and if two are related to one problem.

 

[RayVoy]

I see a new transfer case in your future

 

[csoldfield]

Manual states if the transfer case is in Neutral, then Park wont be effective - truck will roll. So I'd say Yes, the two are related. Sounds like an issue with your transfer case....