2023 Hyundai Santa Cruz drivetrain & axles problems

On 11/6/2022, while driving the vehicle, it suffered a loss of power and would not accelerate. I was in the vehicle with my wife and 2 young children who felt the vehicle shudder. I was able to drive the vehicle to my home. On 11/7/2022, upon starting the vehicle, I received an error notice from the internal diagnostics system: transmission control P087501 POWERTRAIN TCU. System advised to have vehicle serviced immediately. Vehicle was towed to nearest Hyundai dealership. Further information awaited.

The contact owns a 2023 Hyundai Santa Cruz. The contact stated while slowing down at approximately 25 MPH, the vehicle downshifted roughly and would jolt while shifting into gear. The contact stated that the failure had been occurring intermittently. Additionally, the contact stated that the RPMs would remain high while he was at a complete stop. The contact stated that the RPMs would rise above 3,000 RPM while depressing the brake pedal, and he would turn the vehicle off to stop the engine from revving.