The screen in this photo is the one you speak of correct? Maybe that is your problem. Are the shift solenoids the new design with bracket? Maybe it is not installed correctly?
What valve body did you replace?
We are looking for second gear starts.
The torque converter was not replaced and could distribute clutch material, what does the pan show? If you have ANY debris, you are spinning your wheels. We know that the P0741 damages the TC clutches and can spew clutch material.
Have you looked at this?