Brake vibration

Hey everyone, so I`ve had a ongoing brake issue which i only notice when slowing down from highway speeds. It starts vibrating like the rotors are warped but i have just recently replaced the rotors and pads with a good quality set and had the rear brakes serviced. Any thoughts would be great as its getting very frustrating thanks.

 

Tires were new when i bought the truck about 3 years ago. I haven`t tried getting them balanced yet. The thing about that is that it only happens when im braking could that be caused by imbalanced tires?

 

Re-torque all your lug nuts?? If they weren't properly torqued it can screw things up pretty bad.

 

yea i torqued all the lugs because i had that thought in the back of my mind.

 

3 things usually cause vibes you have , warped rotors, bad wheel bearings or wheel problem (check lug nuts, get tires balanced and make sure you dont have any bent wheels) that should solve it

 

Thanks, i will check the wheel bearings next chance i get and let you know what i find.

 

you said you replaced the rotors and pads. ...that would take care of the front. ...but what about the rear? did you have the drums turned and new pads put in the back? if not, they could be causing the vibrations.

an easy way to tell if it's the front or back is to use your emergency brake to slow down. ...if you get vibrations, then the problem is in the rear. if not, then you can assume it's the front.


also, there is no such thing as "warped rotors" ..the brakes don't generate enough heat to melt the rotors.

http://www.examiner.com/auto-in-orlando/there-s-no-such-thing-as-warped-brake-rotors

 

Yup had the rear brakes serviced, and did the e brake test. Thats the first i`ve heard as there being no such thing as warped rotors,

 

is the vibration in your steering wheel, or butt and pedal?

 

there are such thing as warped rotors, hell ive measured em myself

 

There is such a thing as warped rotors. I have also measured them myself. Ive never seen any that obvious with the naked eye but once you measure you can tell. So sorry to the guy who posted that. Its well written but false.

 

that article is not my main source for this info. ..it was just the first one i found. my main brake tech info comes from a good friend that's an engineer in the chassis dept at the honda plant in alabama. he develops and tests brakes, among other things, on a daily basis and he concurs that most vibrations are caused by uneven material transfer.

now, this isn't to say that it's impossible to warp a rotor as it's metal and does expand and contract with heat cycles. ....but normal everyday driving ..or even hard everyday driving isn't going to cause it.

what i did to mitigate the issue with my truck is to run a slotted rotor. the slots seem to keep the material build up from happening. not sure why, but after switching to the sloted rotors, i haven't had a single vibration issue with my truck in 2 years. running standard blanks, i could go maybe 2 months before the vibrations got so bad i had to have them turned. if heat were causing the rotor to warp, why doesn't the sloted rotor warp? only the blanks warp in my application ..and they were the best brembo blanks i could find. ..not some cheap ass autozone shit.

anyway, i won't argue the point any further. ....i'll defer to the so called "experts".

http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-myths

http://www.hendonpub.com/resources/articlearchive/details.aspx?ID=207857

 

slotted rotors do not warp as easy because they dissipate heat faster. that is what the slots/groove/dimples in high performance rotors are for.

 

Rotors don't melt when they warp.


They do warp, as many here have observed and measured. I'm ready to replace mine for the 2nd time, and only have 90K miles on my truck. It appears (to me, at least) to be a problem with the 4x4 rotors. My '01 5 lug never had the problem.

I'm going to get the slotted rotors this time; had them on my Scirocco 16V & they worked very well.

 

Well i just did the wheel bearing test and there was no movement at 12 and 6. The vibration is in the brake pedal, I just find it so hard to believe my brakes are screwed again since I just replaced them in early July. There must be an underlaying issue like my calipers are sticking.

 

look at your rotors to check for excessive scouring or guaging, or take it to your local mech and have them check rotor thickness in 8 spots using a micrometer have them check both rotors and compare also are they OE or better rotors?

 

They are Raybestos `ambulance grade`

 

still check the rotors with a micrometer and report back please. do you have any pulling to one side as you brake? also have you made sure your drum brakes arent the cause of the issue

 

they are Rabestos `ambulance grade`

 

sounds good, i just put my ebrake on to slow down and everything seemed fine