{"nhtsa_id":10241891,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-09-06","date":"2023-08-28","document_id":"23-AT-011H","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"This bulletin outlines changes to the service procedure regarding the replacement of 8-speed wet dual clutch transmissions (8WDCT) and associated transmission control unit (TCU). These changes only apply to vehicles equipped with Theta 2.5T engines. Certain transmissions (indicated by a new part number) have received an improved clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise drivability concerns may occur.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10241891-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10241891-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10241891","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SANTA CRUZ","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_hyundai_santa-cruz","2023_hyundai_santa-cruz"]},{"make":"HYUNDAI","model":"SANTA FE","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_hyundai_santa-fe","2022_hyundai_santa-fe","2023_hyundai_santa-fe"]},{"make":"HYUNDAI","model":"SONATA","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_hyundai_sonata","2022_hyundai_sonata","2023_hyundai_sonata"]}],"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":[]}