{"nhtsa_id":10139755,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-09-26","document_id":"21-012-14 REV. B","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"8 Speed Transmission Shift Adaptation, Drive Learn Procedure This bulletin involves performing a Transmission Adaptation Learn procedure based on a subjective shift quality rating evaluation.The adaptation drive learn procedure must be performed on all 8-speed transmissions when the transmission is repaired/replaced and/or the Valve Body/TCU assembly (mechatronic) is replaced, or when the adaptation memory cells are cleared with the wiTECH diagnostic scan tool. Customers may indicate that their transmission shift quality does not meet their expectations.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139755-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139755-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139755","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHRYSLER","model":"300C","year_from":2012,"year_to":2015,"match":"base","vehicle_ids":["2012_chrysler_300","2013_chrysler_300","2014_chrysler_300","2015_chrysler_300"]},{"make":"DODGE","model":"CHALLENGER","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_dodge_challenger"]},{"make":"DODGE","model":"CHARGER","year_from":2012,"year_to":2015,"match":"exact","vehicle_ids":["2012_dodge_charger","2013_dodge_charger","2014_dodge_charger","2015_dodge_charger"]},{"make":"DODGE","model":"DURANGO","year_from":2014,"year_to":2015,"match":"exact","vehicle_ids":["2014_dodge_durango","2015_dodge_durango"]},{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2014,"year_to":2015,"match":"exact","vehicle_ids":["2014_jeep_grand-cherokee","2015_jeep_grand-cherokee"]},{"make":"RAM","model":"1500","year_from":2013,"year_to":2015,"match":"exact","vehicle_ids":["2013_ram_1500","2014_ram_1500","2015_ram_1500"]}],"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":[]}