Could transmission fluid leak out of one of the end caps on my gx470 radiator? on 2006 Lexus GX470

I looked at it from underneath and it appears there is trans fluid where the fins meet the end cap.

Asked by for the 2006 Lexus GX470
2 more answers , 2 more comments
Could be due to the transmission cooler in the radiator.
Any way to repair this or is the best answer a new radiator?
It would be easier to replace the radiator instead of tearing the radiator apart and replacing the tank. A new one can be a lifetime warranty. O'Reilly's are lifetime and are fairly inexpensive.
I had my radiator replace a couple years ago, there was according to Lexus club members radiator issues with this truck.
Lexus rarely recalls, so I ate the 500.00 for the replacement and have no leakage any more