...but the brakeshop swears the rotors don't need to be resurfaced! When braking from speeds over 60 there is a 1 inch side to side feedback in the wheel. Other than feeling and following every groove in the road, the car seems to steer fine off brakes. I ASSumed it needed a rotor cut. The car has new Project Mu NS pads all around (7-800mi). There are no visible grooves in the rotors. Shop checked them out and said "we don't want to sell you something you don't need." They let me walk out the door because they were convinced the brakes were fine. They suggested checking tire/wheel balance or alignment. Is this possible? Could they have missed something? I've probably got a few K left before I need to replace my Advans.

 

Make sure your lug nuts are torqued correctly for one thing.

 

first thing would be the rotors and brake pads, next the lugs, then check tires for eggs or balding in certain areas..

 

Need to have the shop check the 'run out' on the front rotors with a dial indicator, sounds exactly like there warped.

 

Go to another shop. Obviously they don't want to deal with your problem.

Since you stated it only happens when braking, Yes it's your warped rotors causing the wheel shimmy during high speed braking. Have it resurfaced and your problem is fixed.

 

I've had similar symptoms and had them go away. I've seen a phenomenon described here as "pad transfer". Essentially, pad material has "melded" to the rotors. It rubs/burns/whatever off after a few warmer braking events ... ?

Otherwise, yes, rotors, lugs.

Check for fluid leak around front axles in case one has slipped it's index (happened to me after a wild misadventure with two deer). It pops back in without incident to my amazement and humble thanksgiving to a transmission tech.

Otherwise, most anything else I can think of would "wobble" at speed.

Good luck and keep us posted!

 

What's the torque spec# on the lugs? The pads are thick, the rotors appear smooth to the eye and the tires have no unusual wear. These symptoms have meant warped rotor in every other car I've owned.

 

It's the pads. Not the rotors.

Warren

 

me too.

 

Ummmm...Maybe it's your driving. I think your too hard on your brakes.

65-75 ft. lbs. of torque. Not sure excactly but around there for aluminum wheels.

 

I remember reading somewhere max is 80ft. lbs of torque....

 

You Just Need To Cut The Rotors Or Replace Them To Get Rid Of The Wheel Vibration
Its Caused By The Runout In The Rotors
Also Throw A Set Of New Pads In There

 

This problem is so common on Evos. There is nothing wrong with your rotors. There is nothing wrong with your pads. What you have in uneven deposits of pad material on the rotors. That, combined with the clamping force of the Brembos and the design of the mounting causes the wobble. It occurs because you brake too softly and never clean off the little depostis. Go out and make 4 hard stops from 60 to 30. Then drive around without using the brakes for a few minutes. Get the car up to the speed where it used to wobble and press on the brake pedal reasonably hard. I bet that the wobble is gone.

 

wheel bearings

 

Without a doubt it is your rotors. I have had this problem twice already with my evo I can't wait for it to happen again so I get brand new rotors as long as it happenes within 5,000 miles.