TT Quattro Roadster V6-3.2L (BHE) (2005)
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Control Module: Customer Interest
A/T Controls - Hard Jerking In Reverse At Idle
37 08 19
2005585/7
December 16, 2008.
Supersedes Technical Service Bulletin Group 37 number 07-06 dated April 12, 2007 for reasons listed below.
Affected Vehicles
37 Hard jerking in reverse-update programming (flashing), transmission control module
Condition
Hard jerking when in reverse with engine at idle speed.
Technical Background
If the idle speed drops below 600 rpm with reverse gear selected, the reverse clutch opens to avoid engine stalling. This can increase the engine speed.
The already-filled reverse clutch is then pre-filled (about 200 ms), which causes a jolt. If the idle speed drops below 600 rpm again, this leads to jerking.
Tip: A pre-filling is only necessary when reverse is selected, because of the long pressure pipe to the reverse clutch, it runs empty in a pressureless
condition. The jolt doesn't affect the service life of the gearbox.
Production Solution
No pre-filling after opening to avoid the stalling of the engine from data version 3031 from gearbox production date 4/17/2003.
From the following chassis numbers:
4B3N114000
8E3A394600
Before these chassis numbers, check the data version to find out whether the measure has been performed on the vehicle.
Service
NOTE: Any Update Programming procedure (flash) may overwrite any tuned ECM or TCM programming. A tuned ECM or TCM is described as any
ECM or TCM altered so as to perform outside the normal parameters and specifications approved by Audi of America, Inc.
Current Tuned ECM or TCM requirements: If you encounter a vehicle with a tuned ECM or TCM, your dealership must do the following before
performing any procedure that updates ECM or TCM programming:
-
Notify the owner that their ECM or TCM was found to have been tuned
-
Notify the owner any damage caused by the tuning of the ECM or TCM (including any adverse emissions consequences) will not be covered by
Audi of America, Inc. warranties.
