I have a terrible vibration when I step on the brakes, I just replaced all the pads and still have it. Any thoughts on this would be appreciated.

 

Did you turn or replace the rotors? If not, do so. Your rotors are out of parallel. don't forget to pack the bearings with grease and install a new inner seal. You may have to put new pads on if you didn't turn the rotors.

 

I think you have a warped rotor. I had vibration too until I had the front rotors turned today. Cleared it right up.