{"nhtsa_id":10218232,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-22","date":"2014-11-26","document_id":"21-040-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; WHEELS; STEERING; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: 8HP70 Transmission Shift Enhancements This bulletin involves reprogramming of the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one of more of the following conditions. Intermittent delayed upshifts in 1st or 2nd gear. Less than desired shift quality when operating the vehicle in Four Wheel Drive (4wd) Low mode. With the vehicle stationary and the Selec-Terrain system set to Snow Mode, the transmission will perform a 2-1 downshift when pressing the (+) steering wheel mounted shift paddle instead of remaining in 2nd gear.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218232-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218232-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10218232","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"steering","name":"Steering","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"wheels","name":"Wheels","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_jeep_grand-cherokee"]}],"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":[]}