A Ford Expedition owner appears to have reached the end of his patience after the SUV's replacement transmission began showing signs of failure with just 20,000 miles on it.The troubling case has been highlighted by the Car Wizard YouTube channel, where master mechanic David Long inspected the vehicle after the owner became concerned about its transmission temperature and reliability.The affected SUV is an XLT Expedition Max powered by Ford's 3.5-liter twin-turbo EcoBoost V6. Despite having only 84,043 miles, the SUV was found to have a serious problem with its transmission.AdvertisementAdvertisementThe vehicle's original transmission apparently "grenaded itself" and was replaced by a dealership when the Expedition had around 65,000 miles. That means the replacement unit had covered only about 20,000 miles before beginning to show signs of trouble.The owner had reportedly been monitoring the transmission temperature through an app after noticing that it occasionally spiked. Wanting an unbiased assessment, the owner brought the SUV to the shop to determine whether the second transmission was also nearing failure.The inspection produced an alarming result. When the Car Wizard drained some transmission fluid, it was almost black and smelled heavily burned. He compared the used fluid with fresh fluid, which was bright red, and said the used fluid was "black as midnight" and "burned to a crisp."Owner No Longer Cares About WarrantyThe situation became even more unusual when the customer asked the shop to install an aftermarket transmission pan with cooling fins and replace the fluid. The Car Wizard warned that modifying the transmission could potentially jeopardize any remaining warranty coverage.AdvertisementAdvertisementHowever, the owner appeared to have had enough and stated that he did not care about the warranty anymore. All he needed was for the car to keep running for a little longer before he could do something about it.He asked the shop to install the pan and change the fluid anyway, hoping to squeeze some additional life out of the transmission. The Car Wizard agreed, but made it clear that he could not provide warranty on work performed on a transmission he already believed was failing. The owner accepted the risk and insisted that the job be done.A Losing Battle?According to the Car Wizard, the dealership that installed the replacement transmission had allegedly overfilled it with fluid, after which the owner began experiencing problems. Another shop later corrected the fluid level, but the Car Wizard suggested the damage may already have been done.He warned that the transmission could fail soon or potentially continue running for months. For the owner, however, the immediate goal was simply to get more usable life from the Expedition.AdvertisementAdvertisementThe case serves as another example of the frustration that can arise when a major drivetrain component fails prematurely, and its replacement begins showing problems after covering only a fraction of the vehicle's total mileage.