The transmission on my 2018 Ford F-150 has been experiencing severe and dangerous malfunctions that compromise vehicle safety. Starting around 50,000 miles (currently at 75,000 miles), the truck began exhibiting violent and unpredictable transmission behavior, including: Sudden, uncommanded downshifting from 9th or 10th gear down to 1st or 2nd gear while driving at highway speeds. This causes the engine to redline instantly, the rear wheels to lock momentarily, and the truck to jerk violently, which has forced me to swerve or take evasive action to avoid collisions. Harsh shifting, gear hesitation, and occasional failure to engage gears properly during normal city driving. These issues occur intermittently but frequently, with no warning lights or messages, and the problem persists regardless of driving mode or conditions. I took the truck to a Ford dealership, who dismissed the issue as ‘normal behavior’ for the 10-speed automatic transmission. They quoted a very high fee just to inspect it, with a lead time of several months before they could even look at it. No diagnostic trouble codes were found, and no fix or acknowledgment of the safety risk was offered. After researching the problem online, I found numerous other F-150 owners reporting identical symptoms. This appears to be a systemic failure affecting a wide population of vehicles with the 10-speed transmission. This transmission defect poses a serious safety risk not only to me but to other drivers on the road. Uncommanded downshifting at highway speeds can result in loss of control or a high-speed crash. I believe this issue warrants a formal investigation and recall. The vehicle is available for inspection if needed.