{"nhtsa_id":10156784,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-04-08","date":"2013-11-25","document_id":"TT7401EN Rev A","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Tech Tip concerning 2013 Cummins ISX12 Causing DTC P2641 in Low Reverse with 5th Generation 4700/4800 Transmission. This update became available November 13, 2013","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10156784-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10156784-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10156784","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P2641"],"topics":[],"vehicles":[{"make":"ALLISON","model":"4000 SERIES 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":[]}