raise your car up on jacks, try to wiggle the whole wheel, if it wiggles at all its a wheel bearing, next get up under and try to move your axels, if they move , possibly could be stripped splines, impropper adjustment of axel length, worn cv joints, just a few things to check, most prob either wheel bearings or cv joints...

oh check your driveaxel nut also....about all i can think of right now.

*edit* if your brake disks are warped it will do it also, but you would feel that when you apply your brakes

 

the drive axle nut is what holds the hole thing together, take your wheel off, and its that big center nut,(should be a 32mm nut in the center, most are 30-32mm) if its not torqued properly, or wiggled loose it could create a gap to where it clicks or clangs, most are torqued so good its prob not that but it could happen....

LOL, just noticed you said right rear?....rear wheel drive? or AWD?

 

starting to sound like a shock, inner seal (to tranny), or rear brake prob(lots of springs in the drums, adjuster bolt and clevis), or if you have disks(could be the piston near your calipers)

 

wtf???????? is that even possible..
glad you fixed it...

 

hehe, well glad to hear its nothing major