The 93 has died and I want to swap the 93 to the 95.. the 95 seems to be making a noise from the rear. Don't think its coming from the diff. You can hear it when you drive by parked cars or are close by a building. I makes a sound like"ssshhhhhh" Bearings??? The 93 is SILENT and seems in great shape..How do you check these things? Oil level is ok..Can u-joints make a sound like this? the sound is there on or off the gas. How hard is it to swap these out and is there a search item for it... Thanks!

2002 XLS /LSD/Thule Rack /PIAA Extreme White headlamps /K+N system/Michelin LTX MS--KYB gas-adjust all around
95 LS-- Dual Bouncy Seats 234k and still rockin'