Volkswagen Jetta 2007–2008 — technical service bulletin
Bulletin V011337 2012810 · NHTSA communication 10156020 · issued Nov 20, 2013
Technical service bulletin
communication type
Power Train
component
2007–2008
model years
8
vehicle entries
Official summary
Technical Bulletin (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. The production solution for this issue was updated transmission valve body, ECM and TCM software. This document discusses the "Fault Codes" necessary to diagnosis, and potential remedy of the issue. The fault codes for checking
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.