Nope, I see what we called in the Army a, Class 1 leak. In the last photo, you see a drip forming. From the looks of the drop, it looks thin and clear. Much like coolant.

So it'* not transmission fluid ?
how can I fix it ?
someone have a guide how to replace it ?

Thanks

Knowing my luck, it could be trans fluid. But, it doesn't matter either way. Whatever is leaking from that location, is not repairable. Where that line goes into, is what'* called a quick disconnect fitting. If you slide the plastic clip back down the line, you will see a little C-spring clip inside the housing. Once that is out, the line will pop right out. Now, that quick disconnect fitting is removable from the radiator. It could be as simple as replacing that quick disconnect fitting. But this kind of requires special tools to accomplish. Unless you are savvy in a tool box, you could figure it out.

I suggest taking it to a reputable shop(NOT A QUICK OIL CHANGE SHOP!!) and have them take a quick peek at it.

Mike, I just don't see the "obvious" leak in the picture.....that could be something that was spilled....just suggested a good cleaning to get an idea of if it is leaking, what is leaking, and how bad it is leaking....

Update!
I replaced the connector and the leak stop . I hope so ...

Thanks !

That is great. Glad to hear that it was only the fitting.