Daimler Trucks North America is recalling 698 Freightliner and Western Star trucks because the axle assembly output shaft could fracture, increasing the risk of a crash.

The recall includes 2017 Freightliner Cascadia and Western Star 5700 trucks. The affected vehicles were built with NFD tandem rear axles manufactured by Detroit (previously known as Detroit Diesel).

During the induction hardening process, the axle assembly output shaft on these trucks may have become brittle, according to the National Highway Traffic Safety Administration. This situation could result in the output shaft fracturing while the vehicle is in use.

“A sudden fracture of the through shaft at highway speed while descending a grade will render the compression brake ineffective and may lead to large debris on the road,” according to the recall report.

Both scenarios increase the chance of a crash.

No crashes or injuries associated with this issue have been reported.

The recall is expected to begin in July.

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