{"nhtsa_id":10148611,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-19","date":"2015-01-29","document_id":"21-005-15","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; EQUIPMENT; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Transmission Shift And Drivability Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) and Transmission Control Module (TCM) with new software. NOTE: Both the PCM and TCM must be up to date for these changes to be effective. A small number of customers may experience one or more of the following conditions. ? Will not reach max speed (over 256 kph) during freeway driving. (International Market Only) ? Less than desired upshift quality in Normal or Sport mode ? Shift inhibit while transitioning in/out of MDS mode ? Less than desired downshift quality while coasting with the brake released or while passing. ? Vehicle will not display 2nd gear when entering Manual mode from Snow or ECO mode ? High speed gear hunting (shifting back/forth repeatedly between two gears) ? Will not exceed 20 mph in reverse. ? Less than desired 2nd gear launch quality while in ECO mode ? Unable to launch in 3rd gear in Snow mode in higher altitudes. ? Less than desired shift quality during accelerator pedal tip in/out acceleration during Torque Converter Clutch operation.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148611-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148611-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10148611","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_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":[]}