{"nhtsa_id":612099,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-06-05","date":"1999-09-01","document_id":"SF179A","mfr_campaign":null,"replaces":null,"component":"SUSPENSION:REAR","mfr_system":null,"summary":"SOME VEHICLES WERE BUILT WITH 12K REAR SPRINGS INSTEAD OF 10K REAR SPRINGS. THIS CAUSES THE BODY TO BE TOO HIGH FOR THE STANDARD FEDERAL EXPRESS LOADING PLATFORMS. THE MODIFICATION CONSISTS OF INSTALLING A NEW 10K REAR SPRING ASSEMBLY. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/612099","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"MT45","year_from":1998,"year_to":1999,"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":[]}