{"nhtsa_id":617638,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-03-21","date":"2000-09-01","document_id":"2000C2A","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"ALLISON TRANSMISSION HAS DECIDED THAT SOME 1000 SERIES AND SOME 2400 SERIES TRANSMISSION MAY EXHIBIT A CONDITION IN WHICH THE PARK PAWL DOES NOT ENGAGE WHEN THE TRANSMISSION SHIFT SELECTOR IS MOVED TO THE PARK POSITION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/617638","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"ALLISON","model":"TRANSMISSION","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":[]}