I have read all the posts. I installed an aluminum PS cooler. With the truck on jacks, turning the wheel, I got clean ATF coming out of the clear plastic return line into the waste bucket. When turned one way, the clean fluid pumps out. Then when turned the other way, nothing comes out. It looks like it only pumps in one direction. Is that correct? After 4 qts, I hooked the return hose back up, started engine and got a foam resevoir overflow. Let it settle a day and got the same thing. Am I missing something? Thanx in advance, L.B.

for a job wel done.