{"nhtsa_id":10044782,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-07-28","date":"2012-08-01","document_id":"WSB-42-6","mfr_campaign":null,"replaces":"WSB-42-6-A","component":"SERVICE BRAKES, AIR:DRUM","mfr_system":null,"summary":"WESTERN STAR: WHEN APPLYING THE BRAKES, SOME TRUCKS WILL EXPERIENCE SEVERE SHAKING OR SHIMMYING. MODELS CONSTELLATION, 4700, 4800, 4900, 6900 AND 5900. NO MODEL YEARS LISTED. *PE UPDATED 11/1/12. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10044782","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"brake-drum-shoe","name":"Brake drums and shoes","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"4700","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_western-star_4700"]},{"make":"WESTERN STAR","model":"4800","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_western-star_4800"]},{"make":"WESTERN STAR","model":"4900","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_western-star_4900"]},{"make":"WESTERN STAR","model":"4900","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_western-star_4900"]},{"make":"WESTERN STAR","model":"5900","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_western-star_5900"]},{"make":"WESTERN STAR","model":"6900","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_western-star_6900"]},{"make":"WESTERN STAR","model":"6900","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_western-star_6900"]},{"make":"WESTERN STAR","model":"CONSTELLATION","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"WESTERN STAR","model":"CONSTELLATION","year_from":2012,"year_to":2012,"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":[]}