Noise from area of rear passenger wheel when going over bumps on 2005 Ford Freestar

When driving over small bumps there is a metallic rattle that comes from the right real wheel area. All seems in order brake wise and can not jiggle anything that hits the frame.
Would greatly appreciate trouble shooting ideas.

Asked by for the 2005 Ford Freestar
I would start with replacing the rear shocks because you can grap them to try to get them to rattle but the weight of the van is on them and when they go bad they kinda have a hollow rattle sound, estimates are available here