front end vibration

Just chnged my ball joints on a 95 lumina apv and now I have a vibration at highway speeds when the vehical is not under load, can anyone help

Please do not post in 2 forums. Can we assume this was not there before? How is this vibration felt, in the floor, st wheel, what speed, cruising, acclerating, lots of info missing here.

Sorry about the double posts, I thought I put it in the wrong catagory, anyway, no vibration before,steering wheel, above 55mph only and only when engine is not under load.

Sounds like an Ft drive axle issue to me, especially inner cv joint, did you move them or pull them out doing the ball joints.

no didn't remove cv joints, found some rust behind on of the rotors that may have solved my problem.
Thanks for the tip