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Service bulletin WI21-004

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10187900
Published by NHTSA2021-03-02
Manufacturer's numberWI21-004
Manufacturer's date2021-02-01
NHTSA componentPOWER TRAIN; ENGINE AND ENGINE COOLING

NHTSA's summary

Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters. Detroit's TechComm team created visual aids for the network and released exploded view posters for DD platform engines. In early 2021, Detroit added multiple DT12 posters.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Transmission and driveline

Vehicles listed
FCCC XBP2016 to 2021
FCCC XCR2016 to 2021
FREIGHTLINER 108SD2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER 114SD2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER 122SD2016 to 2021
FREIGHTLINER BUSINESS CLASS M22016 to 2021
FREIGHTLINER CASCADIA2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER ECONIC SD2019 to 2021
THOMAS BUILT BUSES SAF-T-LINER C22016 to 2021
WESTERN STAR 47002016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 49002016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 49X2021
WESTERN STAR 57002016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 69002016, 2017, 2018, 2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20211742021-03-24. Powertrain
21V2090002021-03-24. POWER TRAIN:CLUTCH ASSEMBLY
21V0730002021-02-12. ENGINE
20V7420002020-11-30. POWER TRAIN:CLUTCH ASSEMBLY
20204882020-10-16. Powertrain
20V6420002020-10-16. POWER TRAIN:CLUTCH ASSEMBLY
20204082020-09-01. Engine
20V5270002020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING
20V1760002020-03-23. POWER TRAIN:AXLE ASSEMBLY
19V4430002019-06-11. POWER TRAIN:AXLE ASSEMBLY

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB-42-080-FTL2026-08-03. Service bulletin. Revised Technical Service Bulletin for ABS Wheel Speed Fault Code Correction for MBSP Equipped Vehicles. Updated frequently asked questions.
TSB-26-057-FTL2026-06-01. Service bulletin. Revised Technical Service Bulletin for DT12 OVX Transmission Refresh
ICI26-0062026-05-02. Other. Important Campaign Information for SF706 - Revised, Reactivated
SF706-DLR LTR2026-05-02. Service bulletin. Revised Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
SF706-Bulletin2026-05-02. Service bulletin. Revised Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
CXA 03_26_Surge Tank2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20)
ICI26-0032026-04-02. Other. Important Campaign Information letter for SF706 - campaign suspended
FleetCom_SF7062026-03-04. Other. Fleet Communications for SF706 - Cascadia axle conversion
SF706-OWN LTR2026-03-04. Service campaign. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
SF706-DLR LTR2026-03-04. Service campaign. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)