{"nhtsa_id":11026419,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-12-05","date":"2025-11-10","document_id":"FS015","mfr_campaign":"FS015","replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Certain chassis equipped with a PACCAR TX-12 transmission have Mechatronic Transmission Module (MTM) rail cylinder cap screws that could become loose. This may cause the transmission not to shift and the transmission service lamp to illuminate.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026419-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026419-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11026419","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T680","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_kenworth_t680","2023_kenworth_t680"]},{"make":"PETERBILT","model":"579","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_peterbilt_579","2023_peterbilt_579"]}],"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":[]}