{"nhtsa_id":10159950,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-05-20","date":"2015-11-21","document_id":"21-064-15","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE","mfr_system":null,"summary":"Flash: 8HP70 Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. The purpose of this software release is to enable the capability to capture non Diagnostic Trouble Code (DTC) control module data through the Uconnect Data Recording system. In addition, the following improvements are available. 2015 WK ? Improved upshift timing in eco, base, and hill modes and while using cruise. ? Improved 8-7, 3-2, and 2-1 downshift timing. ? Improved shift timing at higher altitudes. ? Improved torque converter engagement. 2015 DS ? Improved 7th gear upshift timing.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159950-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159950-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10159950","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"DODGE","model":"DURANGO","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_dodge_durango"]},{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_jeep_grand-cherokee"]},{"make":"RAM","model":"1500","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_ram_1500"]}],"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":[]}