Air in the system. Is the fluid foaming?
I don't think so. By the time I get under the hood to check though the res is basically empty because all the fluid has been blown out.
Does it blow fluid out when running or when you shut it off
When running. By the time I shut 'er down there's nothing left!
So, first time it happened was completely out of the blue, I was coming home with my parts truck on the trailer and a few miles from home I noticed that it took quite a bit more effort to turn. Got home and there was fluid all over the driver's side of the frame, axle, etc and the pump was basically empty.
Swapped pumps, filled up and started the truck up, power steering worked fine. Turned the wheel back and forth a couple times, shut it down and topped off. The next morning I fired it up, drove 200 miles or so with no issues, then it puked the fluid out. Ever since then it won't hold any fluid.