Kia Optima: Changing the Automatic Transaxle Fluid
1. Raise and suitably support the vehicle.
2. Remove the drain plug located at the bottom center front of the transaxle pan.
3. After the oil has drained, completely install a new washer on the plug, reinstall the drain plug, and tighten to 22 lb•ft (30 N•m).
4. Lower the vehicle.
5. Remove the Automatic Transaxle dipstick located near the center of the engine compartment bulkhead and, using a funnel, add approximately 2 quarts (2 liters) of automatic transaxle fluid (SK ATF SP-III or diamond ATF SP-III or equivalent).
Do NOT overfill the automatic transaxle reservoir. Doing so can cause a seal “blow out,” loss of fluid, and damage to the transaxle. If you overfill the reservoir, you must drain the excess prior to driving the vehicle. The transaxle will hold 2.7 qts. (2.5L) when completely empty. However, it is likely that there will be fluid left in the transaxle after draining, especially if the front of the vehicle was raised to remove the drain plug.
6. Check the fluid level. If necessary, add a small amount of fluid and check the level again. Continue this process until the level reads within “HOT” range.
7. Replace the dipstick and properly dispose of the used transaxle fluid.