Jeep Cherokee 2019 — technical service bulletin
Bulletin 21-045-20 · NHTSA communication 10181604 · issued Sep 11, 2020
Technical service bulletin
communication type
Power Train
component
2019
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience any one of the following: An audible clunk after applying throttle from a coasting condition, predominantly in fifth and sixth gear while driving 48-72 kph (30-45 mph). Poor shift quality or ?bump? experienced during 2-1 coast downs with light brake or no brake applied. Vehicle does not default to automatic drive. Paddle shifters are disabled. "Shift not allowed' displayed in cluster when attempting to upshift while already in 9th gear.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.