{"nhtsa_id":11033839,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-06-16","date":"2026-06-05","document_id":"26-AT-004H TSB","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"This bulletin provides information related to a Transmission Control Unit (TCU) software update for some vehicles equipped with an 8-speed wet dual clutch transmission (8WDCT). The software update revises the touch point learning variation, improving drivability and judder symptoms. Certain 8WDCTs (indicated by a new part number) received an updated clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise, drivability concerns may occur. This service procedure should be performed prior to any 8WDCT replacements done for drivability/judder concerns.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11033839-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11033839-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11033839","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"ELANTRA N","year_from":2022,"year_to":2026,"match":"exact","vehicle_ids":["2022_hyundai_elantra-n","2023_hyundai_elantra-n","2024_hyundai_elantra-n","2025_hyundai_elantra-n","2026_hyundai_elantra-n"]},{"make":"HYUNDAI","model":"KONA N","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_hyundai_kona-n","2023_hyundai_kona-n"]},{"make":"HYUNDAI","model":"VELOSTER N","year_from":2021,"year_to":2022,"match":"exact","vehicle_ids":["2021_hyundai_veloster-n","2022_hyundai_veloster-n"]}],"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":[]}