{"nhtsa_id":11027060,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-01-06","date":"2025-12-18","document_id":"27-011","mfr_campaign":"27-011","replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"A transmission control module (TCM) software update is now available for certain T680 / T880 / W900 / W990 chassis with Eaton Endurant transmissions running TCM software version 5516372, where the PTO fails to operate or engage. Please see the attached Eaton bulletin TAIB- 1021 in the Attachments section of this bulletin for complete details.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11027060-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11027060-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11027060","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T680","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kenworth_t680","2026_kenworth_t680"]},{"make":"KENWORTH","model":"T880","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kenworth_t880","2026_kenworth_t880"]},{"make":"KENWORTH","model":"W900","year_from":2025,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"W990","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_kenworth_w990","2026_kenworth_w990"]}],"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":[]}