Passat Sedan L4-2.0L Turbo (BPY) (2007)
/Page-2002001.png)
PROM - Programmable Read Only Memory: Customer Interest
A/T Controls - Harsh 5-4 Downshift After A Long Drive
01 07 63
Sept. 6, 2007
2012810 Supersedes T.B. Group 01 number 07-41 dated May 2, 2007 due to additional 5-4 downshift software update.
Vehicle Information
Condition
Update Programming, TCM Software Update and Valve Body Replacement for Harsh Up/Down Shift from Transmission when Cold; TCM Software
Update for Harsh 5-4 Downshift After Extended Highway / Long Distance Driving
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).
Customer may experience harsh 5-4 downshift on off-ramp after extended highway / long distance driving.
Technical Background
For harsh 1-2-3 up / downshifts when cold:
Internal transmission pressure difference on solenoid valve -N283- during shifting.
Updated Transmission Control Module (TCM) software and updated transmission valve body addresses:
Harsh Up/Down Shift 1-2-3, 3-2-1.
For harsh 5-4 downshift after extended highway driving:
Internal transmission pressure decrease in C1 clutch due to accumulated air in the C1 oil circuit. Software issue only. DO NOT REPLACE VALVE
BODY FOR THIS ISSUE.
Updated Transmission Control Module (TCM) software addresses:
