I have a 727 that has a Coan reverse manual valve body I put in it a number of years ago. I just put on a bigger pan and remote tranny cooler because it got hot last year. Any way I wanted to flush all the old fluid out of the converter but it has no drain plug. So I ran the pressure line from the tranny to a bucket to start it up and flush it out. For some reason it does not seem to be pumping any fluid when it is in neutral, I know it shouldn't in park but thought it should in neutral. If I put it in 1st it starts pumping right away, drop it back in neutral and it stops. Now I didn't run it through all the gears so is it air or something that is causing this? Or is something worse going on?
