The contact owns a 2019 Toyota Highlander. The contact stated while driving at an undisclosed speed, the contact became aware of an abnormal whining sound coming from the vehicle, and the transmission was shifting hard. No warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not yet repaired. The manufacturer was made aware of the failure, and a case was filed. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 95,000.