{"nhtsa_id":621160,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-09-10","date":"2001-06-01","document_id":"01906","mfr_campaign":null,"replaces":null,"component":"SUSPENSION","mfr_system":null,"summary":"REAR SUSPENSION CROSSMEMBER IMPROVEMENT FOR 4300 AND 4400 MODELS BUILT BETWEEN OCTOBER 24, 2000 AND APRIL 16, 2001 WITH INTERNATIONAL RIDE OPTIMIZED SUSPENSION (IROS), EXCLUDING THE LOPRO MODELS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/621160","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"INTERNATIONAL HARVESTER","model":"4300","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL HARVESTER","model":"4400","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":[]}