{"nhtsa_id":10150549,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-12-10","date":"2015-04-21","document_id":"21-026-15","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one or more of the following transmission related concerns. ? Less than desired shift response when towing or driving up steep hills in high ambient temperatures. ? Delayed shift when driving in 4WD Low. ? Vibration or resonance in the cabin on acceleration from a cruising speed.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10150549-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10150549-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10150549","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2014,"year_to":2015,"match":"exact","vehicle_ids":["2014_jeep_wrangler","2015_jeep_wrangler"]}],"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":[]}