{"nhtsa_id":10203752,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-02","date":"2021-11-01","document_id":"SF641","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Field Service Campaign for Western Star 49X Transmission Cooler Plumbing. Due to normal vibrations combined with inadequate support, the quick-connect fittings on the transmission oil cooler lines may experience excessive wear, leading to a transmission oil leak; if not addressed, this could lead to transmission damage.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203752-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203752-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10203752","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"49X","year_from":2021,"year_to":2022,"match":null,"vehicle_ids":[]}],"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":[]}