Just thought I'd bring this back to life. I think I'm going to have some time this weekend to work on the Jeep.

I've since found two different guys with the exact same symptoms. Both of them had clogged coolers, and after going with an aftermarket cooler their symptoms went away. Both seemed to imply there was a coating or something in the cooler that broke loose. I've checked and bypassed my cooler, and that doesn't seem to be my problem. However, I didn't really check the hard lines themselves. Something could have worked it's way down the return line. I'm going to pull the return line, and make sure it's clear. If so, I'll pull the valve body, and see where the line goes inside, and make sure there is no blockage there...

that is unless someone has a better idea, or reason I shouldn't.

thanks...