Locate Hyundai Sonata Transaxle Seal Replacement Cost. Find Hyundai Sonata Transmission Dipstick Tube Seal & Hyundai Sonata Transmission Gasket Kit. Maintaining the transmission seals of your Hyundai Sonata is crucial for avoiding costly repairs. Regular checks for leaks, especially around the transmission pan, can signal the need for replacement to prevent fluid loss and potential transmission failure. Enhancing the lifespan of these seals involves using high-quality transmission fluid and ensuring your vehicle undergoes routine servicing. When selecting new transmission seals, opt for OEM-quality materials that offer superior durability and a perfect fit, tailored for the Sonata's specifications. Proper installation, ideally by a professional, further guarantees the optimal performance of your vehicle, safeguarding your investment and maintaining the integrity of your Sonata's transmission system.