I have a 2000, Dodge Durango SLT 4x4. when traveling at slow speeds, mainly when parking or driving on parking lots, I get a growling sound which sounds as if it is coming from the front differential. It only happens when the wheels are turned either left or right, it goes away when the wheels are staightened. I am familiar with the sound that a power steering pump makes when bottomed out either left or right, but this is definetly not that. Any suggestions?