Loose Fasteners May Allow Driveshaft to Detach – 2022-2023 Gillig Low Floor Transit Buses

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September 14, 2023 NHTSA CAMPAIGN NUMBER: 23V635000

Loose Fasteners May Allow Driveshaft to Detach

A detached driveshaft can cause a loss of vehicle control, increasing the risk of a crash.

 

NHTSA Campaign Number: 23V635

Manufacturer Gillig, LLC

Components POWER TRAIN

Potential Number of Units Affected 223

 

Summary

Gillig, LLC (Gillig) is recalling certain 2022-2023 Low Floor transit buses. The driveshaft fasteners may have been improperly tightened after service repairs, allowing the driveshaft to detach.

 

Remedy

Gillig will replace the driveshaft straps and fasteners, free of charge. Owner notification letters are expected to be mailed October 16, 2023. Owners may contact Gillig customer service at 1-510-264-5073 or 1-800-735-1500.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 


Chronology :

08/17/2023: Gillig received the first notification about a failure affecting a customer bus and opened an internal investigation.

08/25/2023: during the initial investigation, one broken bolt was found nested in the transmission output yoke.

08/28/2023: after further investigation, it was observed that an impact wrench tool was used to tighten the bolts when reinstalling the driveshaft after repair work performed on certain vehicles. The tool is capable of torquing bolts above the yield strength of the material. In addition, bolt re-use is not allowed on this application.

09/06/2023: Failure analysis confirmed the initial suspects of bolt over-torque. Population analysis indicates that 223 vehicles may be affected by the issue.

09/11/2023: the Gillig Safety Committee decided to file a voluntary safety recall to address the issue in the field.

 


2 Affected Products

Vehicle

MAKE MODEL YEAR
GILLIG LOW FLOOR 2022-2023

 


3 Associated Documents

Defect Notice 573 Report

RCLRPT-23V635-3594.PDF 215.472KB

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Recall Acknowledgement

RCAK-23V635-3258.pdf 645.417KB

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Recall 573 Report – 09/15/2023

RCLRPT-23V635-8162.PDF 215.489KB

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Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=23V635&docType=RCL

 


 

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