Vibration during rolling stop
Thread Starter
Burning Brakes
Joined: Jul 2006
Posts: 824
Likes: 3
From: Houston, Tx.....'05 Corvette M6 LS3 Magnuson Heartbeat
Vibration during rolling stop
Looking for so advice.....
As I'm rolling to a stop, I'm feeling a vibration what seems to be coming from the front. It occurs ONLY while rolling to a stop only between 15-10 mph as I'm slowing down. The front tires show normal wear, not worn. The front brake rotors (Z06) are smooth and pads (Hawk Performance Ceramic) have ~75% pad left.
Is it possible one of my front hub bearings are going bad w/ ~46k miles?
As I'm rolling to a stop, I'm feeling a vibration what seems to be coming from the front. It occurs ONLY while rolling to a stop only between 15-10 mph as I'm slowing down. The front tires show normal wear, not worn. The front brake rotors (Z06) are smooth and pads (Hawk Performance Ceramic) have ~75% pad left.
Is it possible one of my front hub bearings are going bad w/ ~46k miles?
Thread Starter
Burning Brakes
Joined: Jul 2006
Posts: 824
Likes: 3
From: Houston, Tx.....'05 Corvette M6 LS3 Magnuson Heartbeat
Yes, while applying brakes rolling to a stop. The vibration (steering wheel & brake pedal) occurs only while slowing down as the speed drops between 15-10 mph and is consistant.
I might try having the rotors turned, but was wondeing if it's a front hub bearing going bad.
I might try having the rotors turned, but was wondeing if it's a front hub bearing going bad.
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Have you had recent tire work done on the fronts, maybe overtightened lugs warped the rotors. This is my biggest fear when having the wheels taken off. I always ask and watch to see that they use an torque wrench properly.
Melting Slicks
Joined: Oct 2001
Posts: 2,786
Likes: 49
From: Sun Devil Country
Yep, I think you're experiencing rotor 'run out'. If they're not drilled & slotted, you can mic em to dertermine if they can be turned. If not, you're looking at replacement. Had the same thing happen on my 99 (drilled & slotted) and replaced them with GM Performance rotors.
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 852
From: Daytona Beach FL
Looking for so advice.....
As I'm rolling to a stop, I'm feeling a vibration what seems to be coming from the front. It occurs ONLY while rolling to a stop only between 15-10 mph as I'm slowing down. The front tires show normal wear, not worn. The front brake rotors (Z06) are smooth and pads (Hawk Performance Ceramic) have ~75% pad left.
Is it possible one of my front hub bearings are going bad w/ ~46k miles?
As I'm rolling to a stop, I'm feeling a vibration what seems to be coming from the front. It occurs ONLY while rolling to a stop only between 15-10 mph as I'm slowing down. The front tires show normal wear, not worn. The front brake rotors (Z06) are smooth and pads (Hawk Performance Ceramic) have ~75% pad left.
Is it possible one of my front hub bearings are going bad w/ ~46k miles?
http://www.stoptech.com/tech_info/wp...rakedisk.shtml
Here's a cut-n-paste from the document:
if both disc and pad are not properly broken in, material transfer between the two materials can take place in a random fashion - resulting is uneven deposits and vibration under braking. Similarly, even if the brakes are properly broken, if, when they are very hot or following a single long stop from high speed, the brakes are kept applied after the vehicle comes to a complete stop it is possible to leave a telltale deposit behind that looks like the outline of a pad. This kind of deposit is called pad imprinting and looks like the pad was inked for printing like a stamp and then set on the disc face. It is possible to see the perfect outline of the pad on the disc. (FIGURE 5)
Fig 5
Fig 5
Keep reading and down toward the bottom you'll read about cleaning the rotors with garnet paper (NOT sand paper or emery cloth) to try to remove the uneven pad material buildup.
You can read everything about brakes on their site:
http://www.stoptech.com/tech_info/te...e_papers.shtml
Scroll down to "Removal of Uneven Pad Deposits From Rotors Using Aggressive Friction Compounds" to read about using your aggressive track pads to scour uneven pad buildup off the rotor to smooth it off.
Good luck with your problem, but as the StopTech documents say, these rotors just don't "warp", so I don't think that's your problem at all!!
Bob
