Buzzy brake

[Jim Anderson]

My brakes have been making a funny sound. Just as I come to moderately hard stops the front right wheel makes a buzzing kind of sound at the speed of the wheel rotation. It sound a little like the ABS. I don’t feel anything through the steering wheel or brake pedal and it stops straight. I’ve had the wheel off and everything looks fine with plenty on the pads. It is due for a brake fluid change for its 90,000 mile service and I haven’t used the ABS in a while (been lucky). I was thinking it might be warped but they haven’t gotten wet in a while or been hot and the buzzing is at a higher rate than what I would expect of warping. I’ve never had a warped rotor so I don’t know what it would feel like. It also doesn’t seem to be getting worse. What could it be

[sixto]

I take it it's not a scraping sound as you'd expect if the shield were in contact with the rotor.

My 91 300SE sometimes makes a sound like you hear when you're in a plane backing out of the terminal. Kind of like the pad is shuddering against the rotor. Sounds louder with more pedal pressure. Doesn't seem to affect brake performance.

Sixto
91 300SE
81 300SD

[Jim Anderson]

No its not scraping, I've heard worn out pad scarping before and seen the results and the sheild and roters looks fine. It does seem speed sensative, light braking doesn't make any unusual sounds.

[Q]

Could be severly grooved rotors.

[Jim Anderson]

I've had a look at the rotors and they look and feel fine, all though they seem a little too smooth, for what thats worth.