[urq] RE : Brake Judder
laraa at sympatico.ca
Fri May 19 12:04:17 EDT 2006
I can confirm the StopTech theory. On the Saab, new Zimmerman discs and
ATE pads, after a long stop at the airport the brakes were feeling like
they were warped... Took a dial gauge just to find that there was no
runout at all. The solution came from inserting abrasive paper between
the pads and the discs, and gently rotate the wheels under the engine
power, after removing the ABS fuse (you'll see why if you don't...).
It's a poor man solution equivalent to resurfacing the rotors on a lathe
(...but I am sure everyone knows now that I am a cheap man...:-)).
Brakes are now fine, no pulsating at all.
Now, the root cause of your shudder might not be the wheels, or the
rotors, or any single part. It may just be the combination of some
parts... Do you have aftermarket wheels ? How big ? Are they hubcentric
? If the wheels are fine on the balancing machine, I'd look at the way
they are installed on the car.
Good luck !
> -----Message d'origine-----
> Not strictly confined to Audi but I know the readers of this list
> much more experience than the usual repair techs!
> There have been many articles written about juddering under
> the least by Stop Tech who essentially say warped discs are not the
> I put new discs, pads, and tyres on my Subaru within the last month
> bedded them in in the usual manner. Brake as hard you like from 55mph
> all is
> smooth. At running speeds in the 60-80mph range there is a slight
> through the steering normally associated with wheel balancing. Brake
> 60-80mph range and there is a sever judder until the speed drops
> Local technician, at very well respected servicing outfit who
> installed the tyres, drove the car and said to replace the discs.
> Question? Anyone experienced another cause for the judder such
> rod ends, steering knuckle, or simply alignment?
> Martin Dapot
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