2005 Hyundai Sonata Owner's Manual - Page 216

6 DO-IT-YOURSELFMAINTENANCE 18 G100B02A-AAT CHECKING THE TRANSAXLE FLUID (AUTOMATIC) G110A01E-AAT G110B05A-AAT To Check the Manual Transaxle Fluid Level Transaxle fluid in the automatic transaxle should be checked at those intervals specified in the vehicle maintenance schedule in Section 5. Recommended Fluid Your Hyundai automatic transaxle is specially designed to operate with HYUNDAI GENUINE ATF SP III, DIAMOND ATF SP III, SK ATF SP III or other brands meeting the SP III specification approved by Hyundai Motor Co.. Damage caused by a nonspecified fluid is not covered by your new vehicle limited warranty. NOTE: Automatic transaxle fluid is basically red in color. As driving distance increases, the fluid color turns darkish red gradually. It is a normal condition and you should not judge the need to replace based upon the changing color. You must replace the automatic transaxle fluid in accordance with intervals specified in the vehicle maintenance schedule in section 5. G100B01L ! CAUTION: Park the car on level ground with the engine off. 1. Using a wrench of the correct size, loosen the oil filler plug by turning it counterclockwise and remove it with your fingers. 2. Use your finger to feel inside the hole. The oil level should be at its bottom edge. If it is not, check for leaks before adding oil. To refill the transaxle or bring the oil level up, add oil slowly until it reaches the proper level. Do not overfill. 3. Replace the plug and washer, screw it in with your fingers and then tighten securely with the wrench. Use of aftermarket ATF additives may cause damage to the automatic transaxle. Only use HYUNDAI GENUINE ATF SP III, DIAMOND ATF SP III, SK ATF SP III or other brands meeting the SP III specification approved by Hyundai Motor Co.. If you are having your vehicle serviced at a facility other than a Hyundai dealer, verify that the correct ATF is used for your vehicle.