727 not pumping fluid

Heres my thinking.

The lube pressure is regulated to 5 to 30psi, and is a function of whats coming out of the TC, which is regulated by the TC control valve to 30 to 75 in all positions except neutral/park where is less(5-30 in park,30-55 in N), which gets its lube from the line pressure circuit.
These are line pressures;
In park, regulated line pressure is listed as 5 to 30 psi.
-In neutral,manual 2nd,and manual low=55psi. drive-breakaway, and drive-second =75psi,Drive-direct=55-90psi,reverse=230-260.

The point is if the line pressure goes down, everything else goes down too.
So even if the manual valve is stuck in park; if line pressure was ok, there would still be 5-30psi of lube pressure.
And that takes me back to Post#12.
Feel free to correct my thinking.