Just started when i hit the brakes at speeds over 55 then it stops at 45mph. Thought brale rotors was warped but they arent. The rjght side tire take more brake pressure to stop then the right side. I checked by jacking it up and spinning the tire and having aomeone push the peddle down. I checked the drive shaft and both ends are shot but i still have a vibration. Today it started when i toom off hard from a stop sign to get on the interstate. Sound like a abs or a rotor.

 

Maybe a bad caliper?

 

i changed the rotors and calibers on the front and now i can feel the brake peddle pulsing when i push it down now. i double checked the airs to make sure they had all of the air of the system. thinking abs stuff might be out

 

If its pulsating while hitting the brakes you probably still have air in the lines,did you start the bleeding process on the right rear? Always start at the right rear then the left rear, then pass front, then drivers front make sure you keep the master full of fluid when bleeding,