{"nhtsa_id":10215978,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-07-18","date":"2013-05-11","document_id":"21-003-13","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"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).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10215978-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10215978-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10215978","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DODGE","model":"DURANGO","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_dodge_durango","2012_dodge_durango","2013_dodge_durango"]},{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_jeep_grand-cherokee","2012_jeep_grand-cherokee","2013_jeep_grand-cherokee"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}