How do you check the transmission oil

If it is sealed (no dipstick), you don’t...or the manufacturer doesn’t want you to know how to. They call the fluid “lifetime” fluid. Each make has a way to check and change the fluid. It is critical that transmission fluid not be over or under filled. I do research on the internet on how to do it. YouTube will probably have a video. Many dodge makes you use the oil dipstick in a plug hole in top of transmission. Too complex to explain.

On my Charger SRT8, you have to purchase a special transmission dipstick...there was not one installed from the factory.