This is exactly the same problem I'm getting on my FL S8. Juddering after about 3000 miles. I've been using EBC Turbo grooved discs and yellowstuff pads but its always the same: Judder, skim, 3000 mile later more judder, skim. It's now getting rather monotonous. I've rebuilt the calipers, which was easier than I thought it would be, but no difference. I've changed pads, discs still no difference. Sadly, in Dubai we don't have anything as sophisticated as Procut but there are plenty of Bodge-It, Fleece-'em and Scarper machine shops that will make matters worse.
I'm convinced the problem is with the front brakes as when moving quite slowly and applying the handbrake there is no judder at all.
One avenue I am pursuing is regarding the front wheel bearings. I had one changed about three years ago and this judder has only occurred since then. The wheel bearing itself comes in a housing that once the hub has been pressed in it is then bolted to the steering knuckle. If this housing has been bolted into the knuckle slightly out of line then this would create a slight misalignment between the disc and the calipers/pads. This could, I think, cause uneven wear which could cause judder. What do you guys think?
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2001 D2 S8. Volcano black. KW Variant 1 coilovers. EBC Turbo grooved discs with Yellow Stuff pads. 19 inch R8 replica wheels with 255/35/19 Michelin Super Sport. In the UK, 1990 Audi 90 2.3 20v Quattro with just 65,000 on the clock and in mint condition.
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