If the fluid is red (put a paper towel down on the spot), then check the transmission gasket for leaks. I'd do this by rubbing a paper towels around it. Then I'd check the transmission cooler lines. Transmission cooler looks like a tuna can.
'07 Mazda 3s - Daily Driver
'10 VW CC 2.0 - Pushing 386 WTQ and 421WHP