{"nhtsa_id":10139677,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-06-27","document_id":"21-020-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Improved Transmission 5-3 Coast Down Shift Quality This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with new software.Vehicles that are being updated from TCM software p/n 682411$$AA, 682235$$AN or 682354$$AN ($$ are wild cards for any number) will not require the transmission Adaptation Learn Procedure as indicated in Service Bulletin 21-013-13. However, vehicles that are being updated from any other TCM software may require the transmission Adaptation Learn Procedure. Refer to Service Bulletin 21-013-13 for detailed procedures. Failure to perform the procedures outlined in Service Bulletin 21-013-13 on vehicles that were updated from any other TCM software besides p/n 682411$$AA, 682235$$AN or 682354$$AN may result in undesirable shift quality. Customers may indicate that they experience poor shift quality during a 5-3 coast down.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139677-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139677-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139677","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"CHEROKEE","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_jeep_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":[]}