94, 4x4, 3.9, 103k miles. Developed rotational squeek up front. Sounds like a u-joint, but replaced ALL of them, and it continues. Also, still had original front brakes and replaced all the works. Squeek goes away if the front drive shaft is out.(Lube levels fine) But now with the front driveshaftrebuilt and balanced at a driveline shop, I'm thinking the hub bearing(s) may be the source. Advise, Thanks