i'm experiencing steering wheel wiggle under heavy braking, any thoughts on a cause?
#1
Burning Brakes
Thread Starter
i'm experiencing steering wheel wiggle under heavy braking, any thoughts on a cause?
On my 97'TT, under heavy braking, the steering wheel wiggles in my hand. I had thought for a time that this was the car following ruts in the road, but have recently experienced it on newly paved roads.
The intensity of wiggle increases with speed of deceleration.
Would this be a symptom of a failing (or failed) OE suspension, of a misalignment, of improper tire pressure or of something else?
My thoughts are the former and I'm considering replacing with HD's.
The car is lowered to ROW, has fresh tires and under 20k miles.
Thanks for any opinions.
The intensity of wiggle increases with speed of deceleration.
Would this be a symptom of a failing (or failed) OE suspension, of a misalignment, of improper tire pressure or of something else?
My thoughts are the former and I'm considering replacing with HD's.
The car is lowered to ROW, has fresh tires and under 20k miles.
Thanks for any opinions.
#3
I have a wiggle at a very specific speed range. Between 45 and 55 mph. I wouldn't characterize it as a heavy brakeing issue. I think it's more pronounced under moderate to light brakeing. I suspect a balance issue.
Do you experience the wiggle at all speeds, or a band? I would think a warped rotor would cause problems at all speeds.
Do you experience the wiggle at all speeds, or a band? I would think a warped rotor would cause problems at all speeds.
#4
warped rotors, maybe, but you'd also feel an oscilation in the brake pedal. right? i had a little too much toe out on my old bmw 330ci and that caused a vibration. have your brakes inspected and alignment checked.
Bradford, those wheels and the color looks great on red!!! Very nice.
Bradford, those wheels and the color looks great on red!!! Very nice.
Trending Topics
#9
Burning Brakes
Thread Starter
car has just under 17k miles. i had the 30k service done at 15k. wouldent warped rotors have been noticed?
The car was road tested at the time. All the work was done by Powertech in northern NJ.
The car was road tested at the time. All the work was done by Powertech in northern NJ.
#10
Burning Brakes
Thread Starter
no oscilation. the brake pedal stays firm from appliation to stop. i experience it most often coming to a stop light when traveling at about 50--you know....when you think your going to make that yellow and decide its too late and have to stop....
#13
Lifetime Rennlist Member
Most often this is the result of uneven deposits of pad material on the rotor. You get inconsistent grip around the rotor, hence the pulsing. Sometimes re-bedding the pads will fix this or a light resurface of the rotors. They can also be cleaned by running an agressive pad (Hawk Blue) for a short time to cleand the rotors of the old material.
#14
Addict
Rennlist Member
Rennlist Member
Join Date: Jun 2003
Location: Orange County, CA
Posts: 494
Likes: 0
Received 0 Likes
on
0 Posts
I had the Shimmy between 40 and 50 MPH. New rotors and pads did the trick for me.
FWIW, I also needed new tires, so those were put on and rebalanced and the shimmy was still there.
FWIW, I also needed new tires, so those were put on and rebalanced and the shimmy was still there.
#15
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Originally Posted by SundayDriver
Most often this is the result of uneven deposits of pad material on the rotor. You get inconsistent grip around the rotor, hence the pulsing. Sometimes re-bedding the pads will fix this or a light resurface of the rotors. They can also be cleaned by running an agressive pad (Hawk Blue) for a short time to cleand the rotors of the old material.