{"nhtsa_id":10082925,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-19","date":"2015-01-21","document_id":"PI 0858","mfr_campaign":null,"replaces":null,"component":"ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"VEHICLE ELECTRONIC CONTROL UNIT (VECU),REPROGRAMMING, VEHICLE SPEED SENSOR. CERTAIN MACK CHU, AND CXU TRUCKS BUILT FROM 10/21/2010 TO 02/28/2011, AND EQUIPPED WITH AN MDRIVE TRANSMISSION MAY EXPERIENCE ENGINE OVER-REV PAST THE GOVERNED SPEED WHILE THE TRANSMISSION IS ATTEMPTING A SHIFT. THIS CONDITION COULD CAUSE ERRATIC SHIFTING AND/OR OVER SPEED MESSAGES IN THE INSTRUMENT CLUSTER (IC) DUE TO INCORRECT PARAMETERS SETTINGS.","document":null,"url":"https://open.wenmarpro.com/bulletins/10082925","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2011,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2011,"year_to":2012,"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":[]}