Freightliner Cascadia 2020–2021 — technical service bulletin
Bulletin SF643 · NHTSA communication 10207350 · issued Jan 26, 2022
Technical service bulletin
communication type
Power Train
component
2020–2021
model years
2
vehicle entries
Official summary
Cascadia with Allison Transmission - Inconsistent Shift. On certain Freightliner Cascadia vehicles with Allison automatic transmissions, a software error may prevent the transmission from shifting out of neutral.
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.