{"nhtsa_id":637863,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-12-06","date":"2002-05-01","document_id":"021001","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"SOME ALL WHEEL DRIVE VEHICLES MAY EXHIBIT A GROWL NOISE AT SPEEDS OF 65-112 KM/H (40-70 MPH). *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/637863","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"FORD","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":[]}