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Service bulletin sb4641

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 id10141733
Published by NHTSA2018-06-18
Manufacturer's numbersb4641
Manufacturer's date2018-02-26
NHTSA componentSTEERING

NHTSA's summary

sb4641 Adjusting Tilt Lock Force on TRW Steering ColumnsB

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

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22019
FREIGHTLINER CASCADIA2013, 2014, 2015, 2016, 2017, 2018, 2019
FREIGHTLINER CENTURY CLASS2013 to 2018
FREIGHTLINER COLUMBIA2013, 2014, 2015, 2016, 2017, 2018, 2019
FREIGHTLINER CORONADO2013, 2014, 2015, 2016, 2017, 2018

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
20215452021-09-02. Steering
21V6890002021-09-02. STEERING:LINKAGES:DRAG:LINK:CONNECTION
20190662019-02-13. Steering
19V0930002019-02-12. STEERING:LINKAGES:TIE ROD ASSEMBLY
20187192018-12-20. Steering
18V9130002018-12-19. SUSPENSION:FRONT:CONTROL ARM; STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING
20185512018-10-09. Steering
18V6990002018-10-05. STEERING

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
FleetCom_Pwr Steer Res2026-01-08. Other. Fleet Communications for Power Steering Resevoir - NTF Replacements
SS3163-FTL2025-01-29. Other. Service Solution for Power Steering Reservoir Fill Cap Venting
ICI23-0102023-04-07. Service bulletin. Important Campaign Information letter communicating that SF660 Field Service Campaign is Replaced by FL967.
SF660A2023-02-04. Service bulletin. Revised Field Service Campaign for Drag Link Tapered Joint
SF6602023-01-06. Service bulletin. Field Service Campaign for Drag Link Tapered Joint
TSN 184842021-05-13. Service bulletin. Technical Service Note on Intermittent loss of power steering assist, LH turn only for Cascadia. Only intended for customers wishing to add a power steering oil cooler. For replacement of the gear reference TSN 46-01
CALFTL32-0102021-02-27. Service bulletin. Customer Advisory Letter for New Cascadia Front Steer Arm – Drag Link Ball Joint Connection Inspection.
WP20-018R2020-12-12. Service bulletin. 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.
WP20-0182020-12-12. Service bulletin. Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. 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.
TechTalk47252020-09-30. Service bulletin. Tech Talk discussion about power steering fluid.