rhythmic thumping/clanking noise while braking

[apgocolts]

I have a 2003 yukon xl that i recently replaced front an back pads and rotors. Now i am getting this rhythmic thumping noise when i brake. The sound is dependent on the wheel speed also, like every time it makes a rotation something is hitting or rubbing. I used the best rotors i could get at Autozone, they are the black ones that are supposed to never rust or warp and also ceramic pads. It is deff coming from the rear somewhere. I have taken both sides apart and regreased 2x now. Please someone help me out here........thanks

 

[4WDTRK]

Are you able to jack the rear end up and rotate the wheel by hand? Can you hear anything?

 

[OR VietVet]

Sounds like a pad movement or caliper movement or caliper mount movement. If can elevate the rear and duplicate and tell which side or both then let us know.