{"nhtsa_id":10136954,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-05-21","date":"2014-02-14","document_id":"21-004-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Shift Quality Improvements This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with new software. Customers may indicate that the shift quality may not meet their expectations under the following conditions:Upshift Improvements Upshift quality in normal mode under light/medium accelerationDownshift Improvements Power-on downshift qualityGeneral Improvements Altitude drivability High speed drivability Grade drivability ECO mode drivability Torque converter clutch control on engagement and tip-in/out General engagement quality in 4X4 high and 4X4 low range","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10136954-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10136954-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10136954","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":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":[]}