{"nhtsa_id":10139723,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-11-08","document_id":"21-036-14","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN","mfr_system":null,"summary":"Flash: Drivetrain Control Module (DTCM), Driveline Bump Sensation During Low Speed Transmission Downshifts This bulletin involves selectively erasing and reprogramming the Drivetrain Control Module (DTCM). A small number of customers may experience a driveline bump sensation during low speed transmission downshifts. This condition typically occurs in speeds less than 15 mph (24 kph) during a 2-1 downshift.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139723-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139723-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139723","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_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":[]}