A4020082017148_1

40 Chattering/skipping sensation in front axle on tight turns
40 20 08 2017148/11 June 26, 2020. Supersedes Technical Service Bulletin Group 40 number 17-69 dated July
11, 2017 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
R8
2007 - 2021
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
11
-
Revised header (Added model year)
10
07/11/2017 Revised header (Added model code)
9
06/29/2017 Revised header (Added model year)
Customer states:
A chattering/skipping sensation is felt in the front axle during tight, slow-speed turns (such as parking maneuvers)
could occur under the following conditions:
 Tires are cold or ambient temperatures are low.
 Road surface is wet/dirty.
 The vehicle has been parked for an extended period of time.
Technical Background
The R8 has the steering dynamic of a sports car. The inner and outer wheels are turned at approximately the
same steering angle to ensure even power distribution through the front self-locking differential during high speed
cornering. This steering dynamic minimizes understeer and ensures vehicle stability in high-speed turns.
Under normal conditions, when the vehicle is maneuvered through tight turns at slow speeds (such as while
parking), the steering angle difference between the inner and outer wheel is not noticeable because the side wall
flex of the tire is sufficient to compensate. Contact with the road surface is maintained.
However, under certain conditions (such as cold weather, wet/dirty pavement, or a long parking period), a front
tire can scrub. The customer may report a shudder or a skipping sensation felt in the steering/front suspension of
the vehicle during slow-speed parking maneuvers.
This is normal performance for the sports car steering dynamic in the R8, and no repairs are required.
Page 1 of 2
© 2020 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.
Production Solution
Not applicable.
Service
Explain the background to the customer.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All parts and service references provided in this TSB (2017148) are subject to change and/or removal. Always
check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the
Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2020 Audi of America, Inc. All rights reserved. Information contained in this document is based on the latest
information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites without the prior expressed written permission of the publisher.
Page 2 of 2
© 2020 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.