Case 1150E Low Trans Pressure & High Torque Converter Temps

My 1150E torque temps are running high into the yellow when it never has before.
Trans gauge never worked so I replaced it with an numbered psi gauge instead of stock color indicated gauge..
At first start up with everything completely cool, I'm seeing 175-190 psi trans pressure at full throttle & 50-60 psi at idle... Once warmed up pressure drops to 150 psi at full throttle & 20-50 psi at idle...
Not really sure where to begin.
Trans pulls within 3-4 seconds of start up as normally does...

Case 1150E Low Trans Pressure & High Torque Converter Temps