||04-22-2012 04:24 PM
:facepalm: could be a simple fix... could be not good.
First, go check all your bushings and the rear trackbar. Make sure nothings loose and nothings overtightened. Make sure the bushings aren't worn out and are properly greased. You'd be surprised what those control arms can do when not maintained.
Second, driveshaft u-joints. I replace mine every 6-months because they're so easy to do when there's no rust in them. Remove the rear driveshaft (if it's stock, unbolt the rear where it meets the differential housing and just pull it off the slip yoke). Check the u-joint for wear, but I'd just go ahead and replace it while you're in there.
Third, crack the differential cover and check your spider gears and ring & pinion. Make sure you're not finding major chunks of anything floating around. If you're finding gear chunks you need to locate source. If it's spider gears - not too difficult a job, if it's r&p come back and we'll figure out the best course of action. While you're in there, ya might want to remove the axle shafts and just make sure nothing is going on with bearings. If you've never replaced your axle bearings, grab a slide hammer from Advanced Auto (free rental) and replace them. Again, simple maintenance that often gets overlooked until it's too late. However, faulty bearings you'll typically notice with a helicopter whirring noise.