[Mike_The_Grad]

I dont have the transmission cooler lines connected to the internal radiator's trans cooler. I only have an external Derale cooler doing the cooling of the trans. It's a 6 pass tube and fin type. I'm getting ready to replace the vacuum modulator with one I picked up at napa for $13. Also I'm going to check the intake manifold vacuum elbow that supplies vacuum to the modulator and replace the short rubber vacuum connector at the intake to the hard steel vacuum line. I vaguely remember similar symptoms when I found out the factory original modulator was bad. So I'm hoping that the modulator replacement is an end to the issues that im experiencing.