Had no power to the front wheels about two weeks ago while in 4WD and 4wdLO. Transfer case was shifting correctly was in wet mud and front driveshaft was spinning with rear wheel speed but no front wheels. Drove fine in 2WD on the highway with no strange noises or vibrations coming from the front end. Then a few days later at the shop it shifted just fine and 4WD has been working correctly since. Through research I see there is an actuator in the front axel has anyone had issues with this or heard of a fix. I spend a lot of time up in the mountains and backcountry with this truck and I can't have the worry of my 4WD system being intermittent burning a hole into the back of my mind.