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Service bulletin TechTalk7742

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 id10183399
Published by NHTSA2020-12-04
Manufacturer's numberTechTalk7742
Manufacturer's date2020-11-12
NHTSA componentSTEERING; SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:SHACKLE

NHTSA's summary

Tech Talk discussion on loose rear spring shackle bushings in the springs causing steer axle to shift on pins. New comments added.

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, Suspension

Vehicles listed
WESTERN STAR 49002020

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

Recalls for the same vehicles and component
20V5390002020-09-03. SUSPENSION:MULTIPLE AXLE

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-32-020-WST2026-03-27. Service bulletin. Technical Service Bulletin for TufTrac M12 Bolts
PB33-005-WST2025-07-08. Service bulletin. Parts Bulletin for Tie Rod Assembly Part Breakdown
SS734-WST2024-06-05. Other. Service Solution for Thread Spring Pin Suspension Alignment & Installation
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.
TechTalk77422020-11-03. Service bulletin. Tech Talk discussion on loose rear spring shackle bushings in the springs causing steer axle to shift on pins,
SS1034783REV2020-10-19. Service bulletin. Revised Service Solution for 20K Detroit Axle King Pin Lube Access. Western Star trucks equipped with 20k Detroit front axles and disc brakes built up to 8/17/2020 do not have sufficient room to access the king pin grease zerk.
TechTalk47252020-09-30. Service bulletin. Tech Talk discussion about power steering fluid.
SBW31-0162020-07-31. Service bulletin. Western Star Bulletin for Non-Airliner Rear Suspension Crossmember Fastener Change. With the start of production on March 2, 2020, the fasteners used to assemble the non-Airliner rear suspension (bogie) crossmember have changed. The rear suspension bogie crossmember gussets to the C-channel will be assembled with 5/8–18 fasteners. This change includes a revision to a higher friction nut that requires an increase in tightening torque. The new higher friction nut can be identified by its green color.
WP20-001REV2020-02-15. Service bulletin. Revision to a Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier-supported coverages in OWL. Revisions are in blue.