Freightliner Cascadia 2014–2020 — technical service bulletin
Bulletin D20M6 · NHTSA communication 10178947 · issued Aug 14, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2020
model years
6
vehicle entries
Official summary
Detroit Diesel Field Service Campaign for DETROIT Reman Built HDEP Engines - Incorrect Gear Train Bolt Torque. The gear train mounting bolts need to be checked for proper torque and adjusted as needed.
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.