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Discussion Starter · #1 ·
We are taking our cali in for brake work... under light to moderate braking the steering wheel shakes very very badly...like the rotors are warped. I guess we'll see what they do. I hope they put new rotors and pads on seeing as the car only has 11k miles on it and has done it for a while. Going around a turn on an off ramp at 45+ mph became dangerous. The wheel would shake violently. I'll keep you all posted of the findings.... also I have not embedded the brakes since we bought it.. Could that be what is wrong? Thanks guys/gals!:D
 

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boostdog said:
We are taking our cali in for brake work... under light to moderate braking the steering wheel shakes very very badly...like the rotors are warped. I guess we'll see what they do. I hope they put new rotors and pads on seeing as the car only has 11k miles on it and has done it for a while. Going around a turn on an off ramp at 45+ mph became dangerous. The wheel would shake violently. I'll keep you all posted of the findings.... also I have not embedded the brakes since we bought it.. Could that be what is wrong? Thanks guys/gals!:D
What you're describing sounds like brake judder could be a possibility. This is due to uneven pad deposits on the rotors causing an uneven rotor surface. This will cause shaking when braking.

Warped rotors are certainly a possibility, but not as common as most people would think. Usually they are the innocent bystanders, always getting the blame. Here's a little on brake judder... http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml.

I suggest you bed your brakes to see if that resolves the problem. This is a procedure everyone should do. This applies to new cars, new brake jobs or anytime symptoms like yours are experienced, regardless of the age of your car and brakes.

When braking, there are two types of friction at play. These are abrasive friction and adherent friction. Here's info on the physics involved in braking... http://www.stoptech.com/tech_info/wp_bedintheory.shtml.

Here's a link on how to properly bed your brakes... http://www.zeckhausen.com/bedding_in_brakes.htm.

You should be aware that there is a great possibility your dealer will not have heard about this procedure unless they have experience in racing. From my personal experience, most will tell you this will warp the rotors!

Give the above a try. You won't hurt anything by doing it and let us know if this worked for you.

Medic
 

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Discussion Starter · #6 ·
Well the rotors were slightly warped and they had to turn both the rotors and the drums all the way around. It feels perfect now...better than when i test drove it even. So all is good and I got a free oil change out of it.
 
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