2019-2022 Peterbilt Trucks Recall 21V906: Winch Brake

Recall 21V906 covers 908 2019-2022 Peterbilt 567, 579, T880, W990, 389, 536, and 537 trucks for winch-brake software. Free repair at a franchised Peterbilt dealer.

What's wrong?

The work brake, also called the winch brake, is the air brake setting used to hold a wrecker or auto hauler still during winching. On covered 2019-2022 Peterbilt vehicles, including 567, 579, T880, W990, 389, 536, and 537 models, software reads vehicle speed and releases the work brake above a set limit.

The problem is in that speed signal and the software parameter tied to it. During winching, slight vehicle movement can create noise in the wheel speed sensor signal. The system reads that bad signal as vehicle speed above the interlock limit, then disengages the work brake even though the operator is using it to keep the truck held in place.

There is no warning sign before failure. A driver can hear air exhaust and feel the work brake release during the winching operation, at which point the truck can roll unless the service brakes are applied manually.

Who's affected?

Covers Peterbilt and Kenworth trucks across the 2019, 2020, 2021, and 2022 model years, tied to brake-system and electrical-system software components.

A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.

What's the safety risk?

Unintended vehicle movement can increase the risk of a crash or injury, especially when the driver expects the vehicle to stay parked or stopped. There is no warning sign before failure, so confirm whether your VIN is included and schedule the software update soon. Repair is free at any franchised Peterbilt dealer.

What should I do?

1. Check your VIN to confirm your 2019-2022 567, 579, T880, W990, 389, 536, or 537 is included in this recall.
2. Contact a franchised Peterbilt dealer to schedule the free software update that keeps the work brake from unintentionally releasing the service brakes during winching.
3. Bring the recall notice if you have it. If not, reference recall number 21V906 when you call.
4. Avoid winching operations until the repair is complete, since unintended vehicle movement increases crash or injury risk.

What happens at the repair

At the dealer, a Peterbilt technician updates the vehicle software so the work brake control no longer unintentionally disengages the service brakes during winching operations. The recall repair is free, including the software update and labor. Owners who paid to correct this same problem before receiving the recall notice can seek reimbursement through PACCAR's general reimbursement plan. Bring invoices and proof of payment to the service desk, or contact PACCAR customer service for the claim process tied to recall 21V906.

Timeline

Frequently asked questions

More information

Source documents

• Download Recall Document (PDF) (PDF) · RCLYLY
• Download Quarterly Report (PDF) · RCLQRT
• Download Recall Document (PDF) (PDF) · RCSB
• Download Recall Investigation Document (PDF) (PDF) · RCRIT
• Download Owner Notification Letter (PDF) · RCONL
• Download Recall Report (PDF) · RCLRPT
• Download Recall Acknowledgement (PDF) · RCAK

This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →