Today I selected 4wd to back up a hill, only needed to move a few feet. it worked, I then returned it to 2Hi, but when i got back in to leave it said "service 4wd" i didn't pay much attention to it until I went to turn and noticed it was still in 4wd. I tried all the switch positions and drove in a circle, tried reverse. Its still stuck. Any ideas on how to correct this? Thank you in advance.
Scott