pakman

Our 1997 A8 4.2 Quattro has a juddering problem under braking. It feels like either the ABS is cutting in when it's not supposed to or it's something to do with the pads/discs.

Front pair from Audi dealer cost a whopping £127.00 and a pair of Zimmerman's from 'German Swedish & French' are only £69.00.

Do you know who makes the OEM discs on the A8? And maybe other Audi's as well?

Thanks

ryoung

In all likelyhood, the juddering is caused by pad deposits on the rotors. [See <A HREF="http://www.stoptech.com/whitepapers/warped_rotors_myth.htm">Myth #1</a>] This can happen in several ways, but an easy way to get rid of the deposits that usually works is to do about six back-to-back 70 to 5 mph hard (near ABS) stops. After the last one, continue driving for a few miles to let the brakes cool before parking.

Pad deposits are not always visible, but the ones at 7:00 in the pic would shake the car violently until they wore off.

Finally, I don't know who makes A8 rotors, and the D2 A8 forum for pre '04 A8/S8's is <A HREF="https://forums.audiworld.com/a8/">Here</a> :-)

<img src="http://pictureposter.audiworld.com/17157/acid2.jpg">