{"nhtsa_id":10148932,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-26","date":"2015-05-27","document_id":"21-035-15","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Flash: Transmission Shift Enhancements This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The customer may experience one or more of the following: Grand Cherokee/Durango 3.6L Engine (Sales Code ERB) ? Erratic shifting complaints while driving up steep hills or towing during hot ambient temperature conditions. ? Transmission shifting does not meet customers expectation while towing a loaded trailer in high ambients (>32°C/90°F). ? Poor performance and/or poor powertrain response when trying to accelerate from speeds >58 kph (36 mph) - All Markets. ? Poor performance and/or poor powertrain response when trying to accelerate from speeds >48 kph (30 mph) - Japan/Taiwan/China vehicles only. ? Transmission shifts inconsistently (gear hunting) when driving up/down steep hills or when towing a trailer. Grand Cherokee 6.4L Engine (Sales Code ESG) ? Poor acceleration or performance above 113 kph (70 mph). ? Transmission shifting while accelerating from a stop does not meet customers expectation. ? Harsh shifting during acceleration with moderate accelerator pedal and then lifting off the accelerator pedal. ? Cannot accelerate up a steep incline or with a loaded trailer in reverse. Wrangler 3.6L Engine (Sales Code ERB) ? Erratic shifting complaints while driving up steep hills or towing during hot ambient temperature conditions. ? Hanging in gear (2nd Gear) when driving up steep hill or Towing (Rubicon ONLY). ? Transmission shifting does not meet customers expectation while towing a loaded trailer in high ambients (>32°C/90°F). ? Poor performance and/or poor powertrain response when trying to accelerate from speeds >48 kph (30 mph) - Japan/Taiwan/China vehicles only. ? Delayed Drive to Reverse shift engagement when the transfer case is in Low Range (4LO) - Rubicon Only. Wrangler 2.8L Engine (Sales Code ENS) Erratic while driving in Low Range (4LO). Transmission shifts in","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148932-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148932-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10148932","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DODGE","model":"CHALLENGER","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_dodge_challenger"]},{"make":"DODGE","model":"DURANGO","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_dodge_durango"]},{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_jeep_grand-cherokee"]},{"make":"JEEP","model":"WRANGLER","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_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":[]}