{"nhtsa_id":10182137,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-11-04","date":"2020-10-29","document_id":"D20M2","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; EQUIPMENT; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Detroit Diesel Field Service Campaign for DETROIT TM2020 Transmission Replacement. It has been discovered that certain TM2020 units have porosity issues in and around the oil cooler line fittings on the center housing.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10182137-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10182137-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10182137","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"CASCADIA","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_freightliner_cascadia"]},{"make":"WESTERN STAR","model":"5700","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_western-star_5700"]}],"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":[]}