ok recently i noticed that my 99 4.0 4x4 AT will squeek around the front end area. it only does it if the tires are at least slightly turned either way and it kinda feels like the 4x4 isnt completely disengaged.. although i can tell a big difference if i put it in 4 wheel. i am certain nothings rubbing and my front dif. is full of lube. so if yall have any suggestions please throw them my way. oh and its bone stock with 140k

 

oh and im almost certain its in the front dif.. what do yall think it could be. it only does it like once for every revolution of the tire