{"nhtsa_id":10046161,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-09-29","date":"2012-08-24","document_id":"TIB-26-022","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"KENWORTH: SOME TRUCKS HAVE MISMATCH OF ENGINE CALIBRATION SOFTWARE AND ALLISON HARDWARE RESULTING IN HYDRAULIC PRESSURE BEING IMPROPER FOR SHIFT CONTROL. MODELS 2010 T270S AND T370S. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10046161","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"software","name":"Software","parent":"electrical"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T270","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T370","year_from":2010,"year_to":2010,"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":[]}