{"nhtsa_id":10218221,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-22","date":"2014-11-25","document_id":"21-038-14","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN","mfr_system":null,"summary":"Flash: 8HP70 SRT Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one of more of the following conditions. Harsh or inconsistent upshift that happens intermittently. Harsh or inconsistent downshift that happens intermittently while coasting or during passing maneuvers. Intermittent delayed shift from 6th gear during aggressive high speed driving.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218221-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218221-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10218221","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","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":[]}