brake problem....

[czo79]

Hello all...
I'm running into a problem when I'm braking at interstate speeds. I'm getting a pulsing vibration that I feel in the wheel primarily, but can also feel in the brake pedal. It isn't as bad as in the past when I have had warped front rotors (or maybe uneven deposition of pad material, depending on who you believe) on a subaru. And it shouldn't be. A couple thousand miles ago I got two front cryo treated rotors, and a new set of hawk hps pads. I do a tremendous amount of highway driving, and I drive fast and don't want speeding tickets, so a lot of braking from 90 down to 70 quickly...
I'm wondering if this could be from the rear rotors? Or I do notice a very slight vibration in the wheel at highway speeds, could me wheels be slightly out of balance, and this vibration is exacerbated during braking? Or is this uneven accumulation of pad material on the front rotors, or the front rotors begining to warp? I hope not. I may have not broken them in correctly...which could contribute...
Thanks

[Legacy777]

Typically if you feel it in the wheel it's the fronts.

I would maybe try pulling the rotors off, sanding them and rebedding everything.

What brake bedding procedure did you do?

Also, highway driving and quick slow downs aren't the best for not keeping deposits from becoming weird on the rotor. The rotor is probably pretty cool during highway speeds if you're not using the brakes often. Then when you jam on the brakes hard, you heat them up quickly....and then you may not be on them for a while.....you can see how this might not lead to the most even pad deposits.

[evolutionmovement]

Could be imbalanced or bent wheels. My car does the same thing but is inconsistent under braking - sometimes there's no pulsing at all. I have 4 yr old cryo rotors and drive about the same it sounds. Rotors still look pretty good and I know the wheels are off slightly. How are the balljoints?

Steve

[czo79]

Well, I had one front balljoint replaced the same time I had the brakes done. I do get some noise from the front end still, but I'm not really sure what is normal pillowball mount noise...It might be worth checking the other one out...
thanks