{"nhtsa_id":635334,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-22","date":"2002-08-01","document_id":"4622","mfr_campaign":null,"replaces":"4622","component":"STEERING","mfr_system":null,"summary":"INFORMATION ON AN INTERMITTENT POPPING OR THUMPING STEERING COLUMN SHAFT NOISE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/635334","components":[{"id":"steering","name":"Steering","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"BUSINESS CLASS","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"CENTURY","year_from":null,"year_to":null,"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":[]}