The contact owns a 2023 Ford F-150. The contact stated that after placing the vehicle in the park in the driveway, the vehicle started to roll backwards. The contact was able to stop the vehicle. The contact stated that there was an abnormal acid odor near the passengeras side rear wheel, and the contact became aware of discolored gear oil and soot on the rim. The contact stated that the passengeras side rear axle hub bolts had completely sheared off and detached from the vehicle. The dealer was contacted and confirmed that the vehicle was not included in NHTSA Campaign Number: 23V896000 (Power Train). The vehicle was not diagnosed or repaired. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The failure mileage was approximately 30,000.