{"nhtsa_id":600194,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-04-29","date":"1998-04-29","document_id":"97120198000","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:CLUTCH ASSEMBLY","mfr_system":null,"summary":"CAMPAIGN BULLETIN ON CUSTOMER SATISFACTION CAMPAIGN TO INSTALL IMPROVED C5 CLUTCH FRICTION PLATES IN B 300(R), B 400(R), AND B 500(R) TRANSMISSIONS IN TRANSIT BUS AND TOUR COACH SERVICE. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/600194","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"clutch","name":"Clutch","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"ALLISON DIV","model":"ALLISON DIV","year_from":1997,"year_to":1997,"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":[]}