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Service bulletin SS701-WST2021

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 id10191148
Published by NHTSA2021-05-01
Manufacturer's numberSS701-WST2021
Manufacturer's date2021-04-29
NHTSA componentPOWER TRAIN

NHTSA's summary

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.

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

Transmission and driveline

Vehicles listed
WESTERN STAR 47002012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
WESTERN STAR 57002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022

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

Recalls for the same vehicles and component
21V2090002021-03-24. POWER TRAIN:CLUTCH ASSEMBLY
20204882020-10-16. Powertrain
20V6420002020-10-16. POWER TRAIN:CLUTCH ASSEMBLY
20187142018-12-19. Powertrain
18V9030002018-12-19. POWER TRAIN:CLUTCH ASSEMBLY
17V3150002017-05-11. POWER TRAIN:AXLE ASSEMBLY
16V6340002016-08-31. POWER TRAIN:AXLE HUBS
15V6170002015-10-01. POWER TRAIN:MANUAL TRANSMISSION

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
CXA_10_25_Tech Questions2025-11-05. Other. CX Advocate for technical questions/issues raised
CXA_9_25_Tech Questions2025-10-03. Other. CX Advocate for technical questions/issues raised
CXA_8_25_Tech Questions2025-09-02. Other. CX Advocate for technical questions/issues raised
TSB26-008-WST2025-05-02. Service bulletin. Service Solution for DT12 Oil Plug Ports
CXA 06_24_Clutch Bolts2024-07-09. Other. CX Advocate communication for clutch bolts
TSB35-023-WST2024-06-05. Service bulletin. Technical Service Bulletin for New Final Drive Over Heat Diagnostic
SF6582023-04-07. Service bulletin. Field Service Campaign for Integrated Predictive Powertrain Control ECU. Resubmitting to fix a table formatting issue.
SS3097-FTL20222022-05-03. Service bulletin. Service Solution for ShipShort Intelligent Powertrain Management (IPM). Due to electronic control supply shortages, vehicles shipped without the Intelligent Powertrain Predictive Cruise (IPPC) module. The purpose of the IPPC module is to improve fuel efficiency when the Predictive Cruise Control feature is enabled. Not having the IPM does not affect othercruise control functions, such as Adaptive Cruise Control or standard cruise control.
ICI22-0172022-05-03. Service bulletin. Important Campaign Information Letter for DDC D21M1 Termination Date Extended. This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an additional three months. Please use the extended termination date for all work under D21M1 from this point forward. REVISION: D21M1 termination date extended to July 1, 2022.
SBW41-0022022-02-05. Service bulletin. Revised Western Star Service Bulletin for Drive Line Vibration. Minor note: added an update of document previously submitted. The related VMRS codes are added