{"nhtsa_id":6092460,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-12-07","date":"1998-11-01","document_id":"SB9805C004","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"SUBJECT REGARDING HYDRA-MATIC 4L80-E TRANSMISSION IMPROVEMENTS FOR 1998. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/6092460","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"ISUZU","model":"NPR","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_isuzu_npr"]}],"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":[]}