{"nhtsa_id":10148899,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-26","date":"2015-05-05","document_id":"21-029-15","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one or more of the following conditions. Less than desired shift response during heavy load or aggressive driving in high ambient temperatures. Bump sensation felt while downshifting during coasting deceleration or normal braking (5.7L and 6.4L applications only). Less than desired fuel economy.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148899-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148899-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10148899","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DODGE","model":"CHALLENGER","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_dodge_challenger"]}],"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":[]}