Freightliner Cascadia 2020 — technical service bulletin
Bulletin D20M2 · NHTSA communication 10182137 · issued Oct 29, 2020
Technical service bulletin
communication type
Power Train
component
2020
model years
2
vehicle entries
Official summary
Detroit Diesel Field Service Campaign for DETROIT TM2020 Transmission Replacement. It has been discovered that certain TM2020 units have porosity issues in and around the oil cooler line fittings on the center housing.
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.