{"nhtsa_id":10201631,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-09-30","date":"2021-09-22","document_id":"TSB 21-2314","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine may exhibit a low-speed downshift operation concern with automatic engine braking enabled. This may be due to the software in the transmission control module (TCM). To correct the condition, follow the Service Procedure to reprogram the TCM and powertrain control module (PCM).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201631-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201631-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201631","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-250 SD","year_from":2020,"year_to":2021,"match":"base","vehicle_ids":["2020_ford_f-250","2021_ford_f-250"]},{"make":"FORD","model":"F-350 SD","year_from":2020,"year_to":2021,"match":"base","vehicle_ids":["2020_ford_f-350","2021_ford_f-350"]},{"make":"FORD","model":"F-450 SD","year_from":2020,"year_to":2021,"match":"base","vehicle_ids":["2020_ford_f-450","2021_ford_f-450"]},{"make":"FORD","model":"F-550 SD","year_from":2020,"year_to":2021,"match":"base","vehicle_ids":["2020_ford_f-550","2021_ford_f-550"]}],"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":[]}