Freightliner Cascadia 2017–2022 — technical service bulletin
Bulletin SB54-345 · NHTSA communication 10200621 · issued Aug 18, 2021
Technical service bulletin
communication type
Power Train
component
2017–2022
model years
6
vehicle entries
Official summary
Freightliner Service Bulletin for Detroit New Final Drive (NFD) Rear Axle Temperature Parameters. Some New Cascadia trucks equipped with Detroit Diesel New Final Drive (NFD) axles have a high temperature warning parameter. The warning is set too low for some applications, and under certain conditions that are not harmful to the axle, the high temperature warning will appear on the dash and indicate an error requiring service.
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.