{"nhtsa_id":11035952,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-08-06","date":"2026-07-30","document_id":"IK2600052","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"This article describes how to fix a speedometer that does not read accurately. An inaccurate speedometer can be caused by changing the tire size, changing rear axle ratio (RAR), or by parameters being inadvertently changed during a programming event. Use the formulas and calculator below to correct the pulses per mile (PPM).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035952-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035952-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035952","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"IC","model":"3300","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"BECB","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"BESB","year_from":2007,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"CASB","year_from":2013,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"CECB","year_from":2007,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"CESB","year_from":2007,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"FECB","year_from":2007,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"FESB","year_from":2007,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"HCCB","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"HCCB","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"ICCB","year_from":2008,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"ICSB","year_from":2008,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"ICSB","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"RCCB","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"RCCB","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"RECB","year_from":2007,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"RECB","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"IC BUS","model":"RESB","year_from":2007,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"CXT","year_from":2007,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"DURASTAR","year_from":2007,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"LONESTAR","year_from":2007,"year_to":2014,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"LONESTAR","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_international_lonestar"]},{"make":"INTERNATIONAL","model":"LONESTAR","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"MXT","year_from":2007,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"RXT","year_from":2007,"year_to":2008,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"TRANSTAR","year_from":2007,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"WORKSTAR","year_from":2007,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"INTERNATIONAL","model":"WORKSTAR","year_from":2014,"year_to":2015,"match":"exact","vehicle_ids":["2014_international_workstar","2015_international_workstar"]},{"make":"INTERNATIONAL","model":"WORKSTAR","year_from":2016,"year_to":2016,"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":[]}