My 2500 4x4 has a squeal on the drivers side that is not brakes, u-joint or bearing: it seems to be a bushing to keep dirt out of housing / if I spray lube on it it stops for a while. Other than pull the hub what can I do?

 

I would pull the axel and replace the u-joint and inspect the bearing myself, then ya can replace the seal wilst yer at it