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Service bulletin WSB-35-4

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 id10056855
Published by NHTSA2015-02-27
Manufacturer's numberWSB-35-4
Manufacturer's date2014-09-01
NHTSA componentEQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

WESTERN STAR: THE EXTERNAL BREATHER, ON FORWARD REAR DIFFERENTIAL CARRIER, HAS AN OIL LEAK AND A REMEDY FOR THE LEAK IS AN ADDITIONAL INTERNAL BREATHER, THAT IS AVAILABLE TO BE INSTALL. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Equipment and accessories

Vehicles listed
WESTERN STAR 49002009
WESTERN STAR 69002009
WESTERN STAR CONSTELLATION2009

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

Recalls for the same vehicles and component
20176362017-12-18. Accessories
17V8100002017-12-15. EQUIPMENT

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
WI21-0082021-04-23. Service bulletin. Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
18SP7452020-12-08. Service bulletin. Special Publication Letter for EPA07 EPA10 Three-Filter Fuel System DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit
18SP7442020-12-08. Service bulletin. Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit.
20TS-012020-01-22. Service bulletin. Technical Service Letter for DDC Series 60 engines concerning Series 60 Cylinder Head Resurfacing/Finish. Detroit Diesel does not recommend third party resurfacing of Series 60 cylinder heads (outside of Detroit and Detroit Reman).
19TL-152019-09-28. Service bulletin. Tool Letter for ICC5 Programming Cable
sbw00022019-04-08. Service bulletin. Technical Publications Ordering
0601-172019-04-01. Service bulletin. SPN 3464 (MCM) (GHG14)
0604-172019-04-01. Service bulletin. SPN 712 (CPC) (GHG17)
0606-172019-03-25. Service bulletin. SPN 3226 (ACM) (GHG17)
0607-172019-03-25. Service bulletin. SPN 96 (MCM) (GHG17)