Jeep Cherokee 2017–2018 — technical service bulletin
Bulletin 21-018-20 · NHTSA communication 10175137 · issued Mar 7, 2020
Technical service bulletin
communication type
Power Train
component
2017–2018
model years
2
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customer may experience a undesirable or long 5-4 shift during a vehicle coast-down.
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.