2009 Hyundai Sonata Owner's Manual - Page 230

DO-IT-YOURSELF MAINTENANCE 6 15 CHECKING THE TRANSAXLE FLUID (AUTOMATIC) G110A01E-AAT G110B05A-AAT G110C01NF-AAT Transaxle fluid in the automatic transaxle should be checked at those intervals specified in the vehicle maintenance schedule in Section 5. 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. 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. Transaxle Fluid Capacity The fluid capacity of the automatic transaxle is: 2.4L 3.3L 8.24 U.S. quarts (7.8 liters) 11.52 U.S. quarts (10.9 liters) ! ! CAUTION: WARNING: 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. The transaxle fluid level should be checked when the engine is at normal operating temperature. This means that the engine, radiator, radiator hose, exhaust system etc., are very hot. Exercise great care not to burn yourself during this procedure.