Peterbilt 536, 537: Powertrain

Affects Peterbilt 536, 537 · 2021–2023 — about 9 vehicles.

The hazard

Issue: On a small number of trucks, a problem with the transmission actuator could cause the transmission to shift into a different gear than the driver selects. This could cause sudden or unexpected movement of the truck. Safety Risk: Sudden or unexpected movement of the truck could create a risk of injury or a crash. Corrective Actions: PACCAR will notify owners by mail and instruct you to take your truck to a dealership to replace the transmission actuator. PACCAR reminds that you should always use the parking brake each time that you park.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational