Recently replaced the radiator and I'm not sure how long this has been like this and it could've been like this before I changed it but it looks like there's a leak somewhere because half the bottom of the oil pan is wet. None of the radiator hoses go to that side of the motor either. I wiped it off and smelled it and it isn't oil, so I know it's not the oil pan gasket going bad.

Also when I changed the radiator and flushed the fluid and replaced it, the new fluid was like a bright green/clear color and I just checked it and it's like a reddish color, so I have no idea how that happened and would like some help getting to the bottom of this (no pun intended)

Attached are some pics

1

Pic 2: hope these convey good enough for y'all. Thanks in advance for the help!

Cant diagnose a leak from those pics. Have you noticed any loss of fluid either coolant or transmission fluid? You must first find out what fluid we are talking about and go from there. Clean up the area with some degreaser and keep an eye on it. Check your coolant levels and transmission level to see if your losing either.

As far as coolant color I would ask what color came out when you flushed? Im not familiar with the proper coolant you should be using. What year and how many miles would also be helpful.

I need to check the transmission fluid but I had to drive to work so I'll check it afterwards but it's a 2002 with 81k and out of the bottle it's a bright greenish color and when I flushed it from the old one it came out a dark red color. And I cleaned it off and it didn't come off its stained on there which confuses me unless it's old. I'm not sure