Freightliner Cascadia 2017–2026 — technical service bulletin
Bulletin TSB35-034-FTL · NHTSA communication 11021242 · issued Jul 28, 2025
Technical service bulletin
communication type
Wheels
component
2017–2026
model years
11
vehicle entries
Official summary
Revised Technical Service Bulletin for Hub Oil Level in Final Drive (NFD) Top Performance Axles on Decked Vehicles
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.