Does the factory transmission cooler that is mounted in the radiator have any kind of check valve? i.e. can the fluid flow either way in the cooler?
I'm thinking of plumbing my power steering into the transmission cooler. I have a 6spd car but have an automatic radiator w/ the cooler in it.
Any unforseen problems other than just plumbing the return lines into the cooler? does order matter?

 

AFAIK, it is just a straight through pipe. Not really sure how hot ps fluid gets though.