Is this leak coolant or transmission fluid?

[Justin Allen]

Coolant Dye and UV light is next on your list. Also Ear Endoscope camera can help in tight spots. Pressure tester also a must.
Coolant leaks are a ***** to find. Second guessing cost money and time. I have been down that road before.

Genius. Why on earth didn’t I think of the dye.

 

[jlglr4]

Just make sure you get the one that’s compatible with the orange coolant (dexcool/oat). I believe Napa has one, and AC Delco, probably others.