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Service bulletin WP20-018R

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 id10184029
Published by NHTSA2020-12-12
Manufacturer's numberWP20-018R
Manufacturer's date2020-12-08
NHTSA componentSTEERING; POWER TRAIN

NHTSA's summary

Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. Revisions are in blue. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications. The Alliance/Mascot aftermarket warranty coverage period has not changed: depending on the part, coverage is for one (1) or two (2) years and current parts, labor, and reimbursement policies apply.

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

Steering, Transmission and driveline

Vehicles listed
FCCC XBP2010 to 2021
FCCC XBR2011 to 2021
FCCC XBS2011 to 2021
FCCC XCL2011 to 2021
FCCC XCM2010 to 2021
FCCC XCP2010 to 2021
FCCC XCR2011 to 2021
FCCC XCS2011 to 2021
FREIGHTLINER 108SD2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER 114SD2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER 122SD2010 to 2021
FREIGHTLINER BUSINESS CLASS M22010 to 2021
FREIGHTLINER CASCADIA2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER ECONIC SD2019 to 2021
THOMAS BUILT BUSES SAF-T-LINER C22010 to 2021
THOMAS BUILT BUSES SAF-T-LINER EFX2010 to 2021
THOMAS BUILT BUSES SAF-T-LINER HDX2010 to 2021
WESTERN STAR 47002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 48002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 49002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 57002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 69002010, 2011, 2012, 2013, 2014, 2015, 2016, 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
20230832023-02-20. Steering
23V1050002023-02-20. STEERING:LINKAGES:DRAG:LINK:CONNECTION
20217392021-12-08. Steering
21V9460002021-12-08. STEERING:GEAR BOX:SHAFT SECTOR
20215452021-09-02. Steering
21V6890002021-09-02. STEERING:LINKAGES:DRAG:LINK:CONNECTION
20213042021-05-19. Steering
21V3690002021-05-19. STEERING:LINKAGES:TIE ROD ASSEMBLY
20212192021-04-12. Steering
21V2560002021-04-12. STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING:CRITICAL FASTENERS

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)
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)
SF706-Bulletin2026-03-04. Service campaign. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)