Kia Sedona transmission noise in 3rd and 4th gear with RPM fluctuations when braking, transmission replacement needed under warranty on Kia Sedona

Some Kia Sedona owners report experiencing transmission noise in 3rd and 4th gear, along with RPM fluctuations when braking, which may indicate potential transmission issues that require attention. These symptoms can be accompanied by shifting delays, grinding or jumping during acceleration, shaking at any speed, and unusual whistling noises or a burning smell from under the hood. If the vehicle is still under warranty, owners may be eligible for a transmission replacement based on the warranty's specific terms and conditions. Kia provides a 10-year/100,000-mile warranty program that includes coverage for powertrain issues, making it essential for owners to be aware of their warranty benefits. Regular maintenance, such as replacing the transmission filter every 30,000 to 50,000 miles, is also crucial for optimal performance. It is advisable for owners experiencing these issues to contact a certified Kia service center for expert advice and prompt resolution to prevent further damage and ensure vehicle safety and reliability.