A/T - Harsh Up-Down Shift When Cold

01 11 30

December 22, 2011

2012810 *Supersedes T.B. Vo10915 dated August 28, 2009 to include VIN ranges from technical bulletin 2015997 (V010762) dated September 6, 2007, which allows archiving of technical bulletin 2015997 (V010762) to avoid further confusion between the two publications in the field.*





Vehicle Information

Condition

Update Programming, ECM, TCM Software Update and Valve Body Replacement for Harsh Up - Down Shift from Transmission when Cold

Customer may experience harsh up shift in gears 1-2 and 2-3, or harsh down shift in gears 3-2 and 2-1. The symptom is most noticeable at transmission temperatures below 60°C (140°F).

No DTCs are stored in the TCM or the ECM for this complaint. Comfort concern only.

Technical Background

For harsh 1-2-3 UP / downshifts when cold:

Internal transmission pressure difference on solenoid valve -N283- during shifting.

Updated ECM and TCM software and updated transmission valve body addresses:

Harsh Up/Down Shift 1-2-3, 3-2-1

Production Solution

Updated transmission valve body, ECM and TCM software.

Service

Check the ECM and TCM software level using the VAS 5051/5052.

Tip:

If the update programming button does not appear, the latest version has already been installed.





Note:

If ECM or TCM software level is below updated software level noted in Updated ECM and/or Transmission Control Module Software table:

^ Install updated transmission valve body Part No. 09G325039B, See Repair Manual Group 38 AUTOMATIC TRANSMISSION, 6spd. Automatic Transmission.

^ Update ECM and TCM program following the procedure below.

Update Programming Procedure





Tip and Note





^ Update the Engine Control Module using the SVM action code as listed in the table shown.





^ Update the Transmission Control Module using the SVM action code as listed in the table shown.





The procedure can be found in GFF under Functions / Component Selection, Software Version Management, Adapting Software.








Warranty





Required Parts and Tools

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.





Owner Information About Control Module Tuning