I have been told you should check your trans fluid after the car has been running for at least 30 minutes and while the engine is running. I have also been told you can check it after starting car, drive around the block a couple of times and return home turn off engine and check levels. What is the best way to check your fluid levels for your transmission. I have also been told that it is the only fluid you check with the engine hot all others should be checked (brake/PSF/oil/antfreeze) when the car is cold, like first thing in the morning.
2001 Kia Sedona