Rotational Noises with braking


Old 06-23-16, 07:04 AM
Thread Starter
Join Date: Dec 2015
Posts: 95
Rotational Noises with braking

Everyone's favorite topic, potential brake noises. I haven't seen anything exactly like this in the forum, so I thought I would post. 2008 Mazda6, 130k miles. Rear brakes and rotors have 55k on them. Fronts only 15k. No squeaking or groaning when stopping.

When driving, especially under 40 mph, I can hear a slight metallic rubbing "wom wom wom" noise which directly speeds up or slows down with speed. It fades away into road noise at higher speeds, because the wheel is rotating too fast. Also, when I lightly press the brakes, this noise becomes MUCH louder and again, follows the speed of the car. So I am thinking it is brake related and not bearings, etc. Any ideas? Warped rotor? Bad brake pad?

Lastly, and this may or may not be related at all (I am not a car expert). With visual inspection, one of the rear rotors is always perfectly shiny on the wear surface, even after short drives, whereas the others are not. That wheel is also much hotter - lug nuts too hot to touch after long drives. It's almost as if it's always touching the pad.

Ideas? Thanks.
Sponsored Links
Old 06-23-16, 03:32 PM
ukrbyk's Avatar
Join Date: Mar 2010
Location: USA/ Pacific NW
Posts: 3,301
Overheating rotor.
Seizing caliper OR pads guides are not lubricated and the caliper is not moving freely on guides.
There is nothing you will guess even half way right without taking each wheel off and doing thorough inspection of pads, amount of wear inner vs outer, how easily cliper slides on pins. Bent dust shield. Objects stuck somewhere.
Stop guessing. Gid id done.
Also, who told you rotor has to be nice and shiny? Good broken in rotor is slightly grayish i tint and sort of dull.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes