Cudafever said

The way i read that diagram was that the oil pump was pulling oil out of the OIL pan and rotating it threw the cooler and then dump it into the inlet.

I don't think that the add-on oil pump is pushing oil back through the converter backwards.
The reason i say that is, that if it was pushing fluid backwards through the converter........then it would be pushing it through the transmissions oil pump, right. and its a gear pump or a positive pressure pump. won't push it through that pump with any volume at all.
I think its pulling it from the pan and running it through the cooler and dumping it back in to the transmission on the return line.
I could be wrong but thats the way i see it.

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