Dodge Durango 2011–2013 — technical service bulletin
Bulletin 21-003-13 · NHTSA communication 10188673 · issued May 11, 2013
Technical service bulletin
communication type
Electrical System
component
2011–2013
model years
6
vehicle entries
Official summary
Flash: Drivetrain Control Module (DCTM) - Transfer Case Operational Enhancements This bulletin involves flashing the Drivetrain Control Module (DCTM) Owners may indicate that they have experienced one or more of the following symptoms:A driveline bump is felt during acceleration at approximately 10 mph (16 kph).The SERV 4WD message appears and the vehicle shifts from 4WD to 2WD.Binding of the front driveline while turning on steep grades at speeds around 3 - 5 mph (5 - 8 kph).
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.