{"nhtsa_id":10191143,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-01","date":"2021-04-19","document_id":"D21M1","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Detroit Field Service Campaign for DT12 Transmission Drive Shaft Cover Plug Reseal. Daimler Trucks North America LLC, on behalf of its DETROIT Powertrain Division, is initiating Field Service Campaign D21M1 on certain DT12 transmissions in order to reseal the bypass plugs of the drive shaft cover located in front housing.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191143-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191143-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10191143","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"CASCADIA","year_from":2012,"year_to":2022,"match":"exact","vehicle_ids":["2012_freightliner_cascadia","2013_freightliner_cascadia","2014_freightliner_cascadia","2015_freightliner_cascadia","2016_freightliner_cascadia","2017_freightliner_cascadia","2018_freightliner_cascadia","2019_freightliner_cascadia","2020_freightliner_cascadia","2021_freightliner_cascadia","2022_freightliner_cascadia"]},{"make":"WESTERN STAR","model":"4900","year_from":2012,"year_to":2022,"match":"exact","vehicle_ids":["2012_western-star_4900","2013_western-star_4900","2014_western-star_4900","2015_western-star_4900","2016_western-star_4900","2017_western-star_4900","2018_western-star_4900","2019_western-star_4900","2020_western-star_4900","2021_western-star_4900","2022_western-star_4900"]},{"make":"WESTERN STAR","model":"49X","year_from":2021,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"WESTERN STAR","model":"5700","year_from":2015,"year_to":2022,"match":"exact","vehicle_ids":["2015_western-star_5700","2016_western-star_5700","2017_western-star_5700","2018_western-star_5700","2019_western-star_5700","2020_western-star_5700","2021_western-star_5700","2022_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":[]}