[clinebarger]

Your P,N,D4,D3 baseline pressure's is a little high, What is it with the TV unhooked? Your looking for just a few pounds above that at closed throttle, Example....If the reading is 75 psi with it unhooked, You want around 77-78 psi with it hooked up.

Are you using the BTO TV spring? It is important that you do!!

The D1 & D2 pressures are very low, What makes this odd is the Reverse Pressures are OK.....All 3 of these positions use the Reverse Boost Valve to boost Line Pressure. So The Reverse Boost valve is working.

Is your shifter adjusted correctly, As in...Are you sure your actually in 1st/2nd at the trans & not between them.....?

Another possibility is there is a major leak in the Overrun Clutch apply circuit, This Clutch is only ON in D1 & D2.
If this is the case....Don't shift into these 2 ranges 'til it can be fixed.