The rear end wobbles when I am going slow, I know it could be a tire, but I also noticed that when I am going around a right curve that the left rear wheel makes a noise that I can only describe as a warble.

Is that possibly the wheel bearing or could that be the tire as well?

 

Could be a bad wheel,tire.axle.severely damaged wheel bearing. You will need to get it off the ground and pull the tire off for inspection.

 

this might sound stupid but make sure your lugs haven't backed off a bit. Happened to me once long ago. It took weeks before it came loose on me after my tires were rotated.

 

Sounds like it could be any of the above. I'd start by checking the lugnuts for tightness. Then get the wheel off the ground (blocking a front wheel)and put it in neutral and start turning the tire slowly. Check the tire for a scrubbed tread, or broken belts. Have someone look at the wheel from behind when you spin it to see if there is a wobble. Take the wheel and tire off and spin the axle checking for a wobble. If everything looks good to that point, then check your rearend housing. If you don't find anything wrong, start checking the other wheels. You should be able to find the problem.

 

Seriously, check the lug nuts lol. I did a rear end swap and put in new LCA's (rod end/poly). I drove it for a bit and there was a kind of metallic rattling noise and the nose dove when turning right (I had just done new Koni's as well so you can imagine my concern). I thought maybe the rod ends were bad, causing the noise. Lo and behold I go outside and go to pull the wheel off and 3 of the lugs came off in my hand. I tightened them up and have never felt so dumb...but yeah long story short, check the lugs lol

 

If the lug nuts do turn out to be loose, make sure you inspect the wheel and the lug studs very closely for wear. Usually if the nuts loosen up, it wrecks the wheel and the studs.