hey guys my uncle has a 76 4wd crewcab with the big D44 front end. remember the old school big hubs well this is the one. anyhow when he puts the hubs in the front end makes a noise. with hubs out its fine. he has replaced the hubs with warn premeiums, replaced the outer bearings. could the bearings near the R&P be shot? can those be replaced with out having the diff/gears resetup.