Ok I need some more ideas about that it scares me to do it but I have seen it done. Had trans in puller rebuilt and was looking at some pulling trucks that with Allison in them still and some don't run cooler is that a good thing or a bad thing. I am pulled both ways and don't know what way to go, anyone have any ideas. I was going to run a cooler in box with a fan or just loop the line right back in tranny with no cooler.