{"nhtsa_id":10139622,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-04-01","document_id":"21-010-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Transmission Torque Management Enhancements While in Reverse This bulletin involves replacing the transmission control module with a revised part. Customers may indicate that the engine does not have enough power to back a trailer up a steep grade. In addition, they may also indicate that the transmission shifts too early during acceleration while turning.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139622-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139622-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139622","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_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":[]}