Originally Posted by sasquatchgeoff

I am thinking the modulator cap maybe. The modulator is on the injection pump right? it has the green vacuum damper correct?

The vac pump is relatively new - installed brand new at 247K. There is 90K on the trans and the filter has never been changed - only the fluid - which is always clear and-decent looking. My bad on the filter. I know I should have changed it by now. I have this inordinately morbid fear of a leaky pan gasket. When I get to that, it will be interesting to see whats there.

The thought of cold fluid being more viscous has me intrigued. But how would pulling over and shutting down remedy the situation?