{"nhtsa_id":10121695,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-11-03","date":"2016-07-20","document_id":"21-026-16","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: · **Improve shift quality for a 2-1 downshift.** · Hanging or delayed upshift when braking down hill or when braking after high vehicle acceleration rate. · Releasing the accelerator pedal rapidly causes hanging or delayed upshift.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121695-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121695-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10121695","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHRYSLER","model":"300","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_chrysler_300"]},{"make":"DODGE","model":"CHALLENGER","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_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":[]}