I went through all this crap with my 65e too. I changed out the PCM (Pressure Control Manifold) and the pressure solinoid. The PCM is the flat silver one on the valve body, and the pressure solinoid is the round one that you take off the accumulator to get to. I reused the old ones the last two time I rebuilt the trans, I've got plenty of power and now it bangs 2nd and 3rd like a bad bitch! Shift solinoids either work or they don't. Pressure solinoids seem to be different, but it sounds like it's just not pressurein up.