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Paccar recalled a number of Peterbilt and Kenworth trucks, affecting certain 2025 model year vehicles, due to a problem with the steering system that can cause a loss of control, according to one note.
About 782 vehicles could have axle sprocket teeth that can break due to an improper component manufacturing process. recall report he said.
The recall affects Peterbilt models 536, 548, 567 and 579 as well as 2025 Kenworth models T280, T380, T480, T680, T880 and W990.
“The steering sector shaft may have been improperly heat treated,” the National Highway Traffic Safety Administration’s recall letter said.
Drivers may hear popping sounds when a tooth breaks, but there have been no reports of injuries or deaths due to the problem, the recall report said.
The problem came from a supplier’s heat treatment furnace. Component manufacturer RH Sheppard, based in Hanover, Pennsylvania, “explained that the lack of properly functioning controls in the heat treatment furnace allowed some shafts in the batch to have lower than required hardness,” according to the report.
A repair and recertification in January 2024 addressed the problem.
In another Paccar recall, a March letter noted potential problems with 116,000 vehicles due to a right-hand shifter that could malfunction. This included the 2025 model year T680 and nine other trucks.