A401544 2017148-

Technical Service Bulletin
40 Chattering/skipping sensation in front axle on tight turns
40 15 44 2017148/7 January 26, 2015. Supersedes Technical Service Bulletin Group 40 number 12-21 dated
February 13, 2012 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
R8
2007 - 2016
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
7
-
Revised header data (Updated model years)
6
2/13/2012
Revised header data (Updated model years)
5
12/2/2010
Revised header data (Updated model years)
4
3/22/2010
Revised header data controlling display in Elsa
3
4/14/2009
Revised header data (Updated model years)
2
11/20/2008
Revised Title to include Repair Group
A chattering/skipping sensation 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 complain about 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.
© 2015 Audi of America, Inc.
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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.
Technical Service Bulletin
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 service manuals for the latest information.
© 2015 Audi of America, Inc.
Page 2 of 2
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.