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Service bulletins for the 2018 Western Star 4700

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.

529 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
TSB26-008-WST2025-05-02. Service bulletin. POWER TRAIN. Service Solution for DT12 Oil Plug Ports
TSB35-023-WST2024-06-05. Service bulletin. POWER TRAIN. Technical Service Bulletin for New Final Drive Over Heat Diagnostic
SBW41-0022022-02-05. Service bulletin. POWER TRAIN. Revised Western Star Service Bulletin for Drive Line Vibration. Minor note: added an update of document previously submitted. The related VMRS codes are added
WSTCAE177-20202021-05-18. Service bulletin. EQUIPMENT; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Meritor Transfer Case Updates
SS701-WST20212021-05-01. Service bulletin. POWER TRAIN. Service Solution for DT12 Harness Chaffing - PT Can Faults. Transmission will not shift into Gear while driving or will not start and trigger multiple PT CAN Fault Codes.
D21M32021-03-31. Service bulletin. POWER TRAIN. Detroit Field Service Campaign for DT12 Gear Grind During Downshift Software Update.
WI21-0042021-03-02. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. 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.
SBW35-0182020-12-30. Service bulletin. POWER TRAIN. Western Star Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning the hub when the axle shaft is removed.
WP20-018R2020-12-12. Service bulletin. STEERING; POWER TRAIN. 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. STEERING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN. 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.
17TS-05REV22020-10-21. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Revised Technical Service Letter for Detroit DT12 TCM GHG17 Only; Bootloader Update. On Detroit DT12 equipped vehicles, it may be necessary to complete an additional step in the programming process when updating the TCM software.
SBW41-0022020-03-03. Service bulletin. POWER TRAIN. Service Bulletin for Midship Bearing Replacement for built vehicles with driveshafts SPL140, SPL170 or SPL250 with first order driveline vibration. This version replaces bulletin from 12/19/19.
SBW41-0022019-12-20. Service bulletin. POWER TRAIN. Service Bulletin for Midship Bearing Replacement for built vehicles with driveshafts SPL140, SPL170 or SPL250 with first order driveline vibration.
SS10345772019-12-03. Service bulletin. EQUIPMENT; POWER TRAIN; STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY. Service Solution to address WST Cab drone / vibration / tapping Under acceleration for vehicles w/Eaton Manual Trans.
19TL-142019-09-09. Service bulletin. POWER TRAIN; EQUIPMENT. Tool Letter for New Final Drive Driver Controlled Differential Lock Spring Compressor. These new axles require a new tool to compress the Driver Controlled Differential Lock (DCDL) spring. To remove and install the DCDL spring, the tool DSN0FDA17001 is needed.
19TL-122019-09-09. Service bulletin. POWER TRAIN; EQUIPMENT. Tool Letter for New Final Drive Pinion Cover Install Tool
19TL-132019-09-09. Service bulletin. POWER TRAIN; EQUIPMENT. Tool Letter for DT12 Seal Protector Sleeve
0701-172019-04-08. Service bulletin. POWER TRAIN. SPN 168 (CPC3) (GHG17)
0604-172019-04-08. Service bulletin. POWER TRAIN. SPN 712 (CPC) (GHG17)
DOC-10334632018-12-10. Service bulletin. POWER TRAIN. SS 1033463 - WST 4700 Transmission Oil Cooler Lines Routing Improvements
DOC-10334462018-12-10. Service bulletin. POWER TRAIN. Vehicles with Meritor drivelines bene from a softer durometer center bearing support. Vehicle will continue to have a 1st order driveline vibration after the driveline assembly was rebalanced.
aeo18M42018-12-10. Service bulletin. POWER TRAIN. aeo18M4 Field Service Campaign D18M4
DOC-10334632018-10-29. Service bulletin. POWER TRAIN. SS 1033463 - WST 4700 Transmission Oil Cooler Lines Routing Improvements
DOC-10334462018-10-29. Service bulletin. POWER TRAIN. SS1033446 Driveline Support Bearing - Meritor Driveline
MY18M42018-10-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. MY18M4-Bulletin-02-MAY-2018 Field Service Campaign D18M4

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.