XJwagoneer

After some deep mud my 2006 WK 5.7 QDII NV245 will not come out of 4 low. I also cannot get the transfer case to neutral. The Service 4wd System message is displayed when I try either of these. I have removed the mud and found no damage. Could it be moisture in a connection? Should I focus on the transfer case, or could something like a differential actuator keep it from getting to neutral?

Thanks