just changed ball joints and now I have a vibration at highway speeds when not under load ? any help would be appreciated

I'd like to know how you made out. I too have a vibration that is there more when you let off the gas, I've balanced tires, replaced wheels, etc..

Good luck..

I must of loosened up some rust that dropped behind the rotor, removed the rotor and cleaned, its gone for now good luck let me know if it helps

Thanks. GLad to hear it wasnt serious. I ask because I had a CV axle replaced. I jacked and ran the car on blocks, thought the CV may be bent but doesnt seem to be..