{"nhtsa_id":10229556,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-09","date":"2022-08-11","document_id":"2102622","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may notice the following condition:Poor coast down quality (bump/clunk) at approximately 16-32 kph (10-20 mph) range in manual mode.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229556-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10229556-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10229556","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":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_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":[]}