{"nhtsa_id":11016468,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-04-04","date":"2025-03-20","document_id":"T020 - PB","mfr_campaign":"T020 - PB","replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Fix-As-Fail Certain Model 535, 536, 537, and 548 chassis equipped with a PACCAR TX-8 transmission received transmission software with an incorrect variable. This software issue may cause DTC 521215-2 to set, the Transmission Dash Light to Illuminate, and shifting to be restricted. A software update is now available to fix the issue. Fix-as-Fail start date: 03/19/2025.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016468-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016468-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11016468","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"535","year_from":2024,"year_to":2025,"match":"exact","vehicle_ids":["2024_peterbilt_535","2025_peterbilt_535"]},{"make":"PETERBILT","model":"536","year_from":2024,"year_to":2026,"match":"exact","vehicle_ids":["2024_peterbilt_536","2025_peterbilt_536","2026_peterbilt_536"]},{"make":"PETERBILT","model":"537","year_from":2024,"year_to":2026,"match":"exact","vehicle_ids":["2024_peterbilt_537","2025_peterbilt_537","2026_peterbilt_537"]},{"make":"PETERBILT","model":"548","year_from":2024,"year_to":2026,"match":"exact","vehicle_ids":["2024_peterbilt_548","2025_peterbilt_548","2026_peterbilt_548"]}],"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":[]}