Usually automatic Transmission Fluid is a reddish color. If you see red fluid on your driveway, then you probably have a transmission leak.
Bad seal? Leaking cooler line?
Check the power steering and transmission fluids to make sure that they are at correct levels. If the leaking one is not low, then clean the areas where fluid is showing and keep checking to see where the leak is. Check all line connections in both systems for visible leaks.
The better question is what is leaking transmission fluid?
Because your transmission has a seal that is leaking.
The repair on the transmission line will depend on where it is. If the leak is at a coupling then the joint may be able to be tightened. If the line itself if leaking or split then it will have to be replaced.
Determine where leaks originates. Cooling line? Seal?
Determine the origination of leak and repair Could be transmission cooler line, seal, etc.
Replace the fitting.
The output shaft seal has failed and transmission fluid is leaking by, and that would explain the transmission fluid appearing there.
Rear main engine seal or front transmission seals
on the transmission. mine is leaking, do you know where to get another one??
You need to check the transmission gasket between the transmission pan and the body. If it's leaking you have to replace it.