{"nhtsa_id":10136530,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-05-14","date":"2016-07-23","document_id":"21-011-16 REV. B","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following Diagnostic Trouble Code (DTC) stored in the TCM memory: · U0404 - Invalid Data Received From Gear Shift Control Module \"A\". In addition, customers may experience the following conditions: · Bumps on 2 - 1 down-shift while braking. · The M on the shifter and Instrument cluster may be blinking. The following improvements are included in this update: · **Improved 2 - 1, 3 - 2 and 6 - 5 down-shifts (6.4L only).** · Improved 1 - 2 light throttle up-shifts.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10136530-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10136530-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10136530","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":["U0404"],"topics":[],"vehicles":[{"make":"DODGE","model":"DURANGO","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_dodge_durango"]},{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_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":[]}