Hi, I hear a squeaking sound from the front axle, like when metal rubs against metal. It happens only when the passenger´s free wheel locking hub is locked(AWD not activated). When the hubs are unlocked there is no such sound, also if only driver´s hub locked, there is no sound either. If I activate AWD it works. Can a squeaking sound mean a worn hub? Thanks for any advise on this. KZJ73.