Did some testing.

My line pressure is 75 psi idling in Drive (throttle lever full forward)
125 psi idling in D (throttle lever full back). this seems to be right to me.

Governor pressure in D (wheels locked) 0 psi and pressure increases progressively as I accelerate (20 psi at 2000 rpm). rear wheels off the ground for these tests and i am having some speedo issues so don't have an accurate MPH. this seems normal to me.

also tested governor pressure with gear selector in 2 and it was 0 psi wheels locked and 10psi at 1000 rpm and 15 at 1500, and 20 at 2000.

here is the part I was unsure of when i put gear selector in 1 and checked governor pressure with wheels locked it was 25psi. as i spun the wheels the governor pressure appeared to increase normally, but was always higher since it was already 25 psi at standstill (i.e., it was 45 psi rolling at 1200 or so rpm?

do these governor pressure responses when in low gear indicate a problem? i thought with wheels locked it should always be 0 psi, but the FSM and munroe book always talk about governor pressure in D only... didn't know if the TF2 somehow routes some pressure there when in low?