im getting a vibration when braking above 50 mph. i have replaced everything, inner and outer tie rods, idler arm and even the control valve and steering ram. the only thing that made any difference is when i aired up the tires from 32 psi to 44 psi. that felt like it got rid of half of the vibration. took it to the alignment shop and they said the control valve had to much play in it so i changed it and the steering ram out but no difference. the tires are in really good shape and have plenty of tread left on them. any thoughts.

 

Do you have front disc brakes?? if so it may be time to have the rotors turned down and replace the pads

 

yes i have the front disc brakes. i did the calipers and shoes a year or so ago but never touched the rotors. i wounder what the runout should be.

 

rotors are worped check your wheel bearings while your in there.

 

Warped rotors when you brake will cause more trouble than reentry from space. See if they are salvageable and buy new pads too.

 

Yeah, sounds like warped rotors

 

If the rotors are in good shape, then they should turn down right away. Don't forget that a tire can be bad. You may try to rotate the front to back and see if that helps.

 

well that was my first thought, the tires. but the tire, alignment shop, insisted the tires were good, figures, after all they sell the tires. i checked the run-out and its under 5 thousands. im going to switch the tires rear to back.

 

I would say most definatley rotors as well. Thats the one downside to discs. If they get hot they will warp and cause vibrations.

 

That's why you get good discs and pads, and bed them in properly.