I know I had noise in the right rear of mine when I got it. It was louder making a turn. Turned out it WAS my bearings.

After the U-Joint let go at the pumpkin headed to Eureka Springs last Oct, mine has started doing it.  Didn't have the problem before.  I took the driveshaft in to the shop and had it re-balanced and new joints installed, along with a new tailpiece. 

Now on cold start for about 30 sec to 1.5 min or so into the trip straight line or turning, I get the noise and it is timed to wheel rpm irrespective of the engine rpm.

This year, the rear 4 u-joints, e-brake and spring are on the list so we will see if it helps.

Probably the bearings, when they're cold. After they warm up, the grease takes care of the squeal.

I'd be really concerned about spindle bearings.  Seeing as the the noise only happens during side load (turning) this makes me think that the spindle is moving in its housing from side to side.

more info... after a bit of playing around the scraping sound is directly related to both (1) right hand turn and (2) load (ie acceleration.) When cold, a right hand turn whilst accelerating is when it is most audible. Button off the gas (still in right hand turn) and it goes much
quieter, almost but not quite gone. Push the gas again
and back it comes. So loading the RH wheel definitely is
a part of it. I'm going for the U Joints... if nothing else they look a whole lot easier to work on than the bearings !

While you have the axles out put the back wheel on and if you can feel any appreciable play, do your bearings.

How many miles are on the car?  Have you ever re-done the t-arms in any way?  Did the noise start out as a dry squek, perhaps?  If the car has 50 to 60k miles on it, and the bearings were never relubed, could be a serious problem, and the spindle greaser only servicrs the inboard brg., I rebuild t-arms, and lost 3 of the rollers out my outside left brg., what a ride, scared the heck out me, and chewed the crap out of the spindle where the outer bearing is press fitted on, that o.d. on the spindle is 1.375", and mine was 1.125 in just 2 miles after the brg. failed.  My name is Phil, pm me and I'll help you in any way I can-Good Luck!

Hi Phil, have sent you a PM. Chris.