2009 1500 sport. Truck popped outta gear it wouldn’t move in 2wd. Put it in 4 auto and then It would move. Good in every transfer case setting but 2wd. Shut the truck off restarted right away while rolling 2wd was fine then. The service 4wd did come on for a couple minutes when it all started. Truck has 170,000 on it. Hardly ever use the 4wd. I’m thinking the actuator is going bad or is getting stuck. Help! any input would be great.