How to Add Automatic Transmission Fluid at an Oil Change

1. Drive the vehicle for ten minutes and then place it in park on a level area. Check the automatic transmission fluid prior to completing the oil change since it's best to check and add transmission fluid at operating temperature.
2. Locate the reservoir and dipstick labeled 'ATF.' It will be found opposite of the regular motor oil, on the driver side of the vehicle and is colored red.
3. Remove the dipstick from the reservoir and wipe it clean with a rag. Replace the dipstick completely and remove it once more. This will give you an accurate reading of the transmission fluid. If the measurement reads 'full' do not add any fluid at this time as over filling can cause damage to the transmission. If the measurement reads between the 'full' and 'add' lines or below the 'add' lines, then add fluid.
4. Place a funnel into the reservoir neck where the dipstick normally sits. Pour a small amount of transmission fluid into the reservoir and allow it to funnel down completely. Check the transmission fluid levels again by removing the funnel and replacing the dipstick completely.
5. Remove the dipstick and read the measurement. Add more fluid, if needed. Continue this process until the measurement reads 'full.' Once finished, proceed to the oil change, as the components and oil will now be cool enough to complete the oil change.