No down shift at stop, slow take off

So is this a lack of power when it warms up? Because I seen plugged catalytic converters on these cars do that.

If you have a new problem with the pcm you just out in time to out the old one back in. Those pcm in those cars rarely fail. We're you getting any codes?The most common issue is the pressure regulator bore in the valve body wears and sticks or causes too low or two high of line pressure in the transmission. Also the input shaft nut loosens up and causes fluid pressure issues. Do you have a delay or delay bang into reverse?

That's really weird that 3 different problems from three different pcms I don't go swaping pcms on those. Like I said I think changed one in all the years I worked for Saturn over 16yrs. If you have a delay bang into reverse you have a pressure issue a leaking piston or a loose input shaft. But if you have a pressure issues it usually effects the higher gears like 3rd and 4th. As far as flashing codes the 1991-1995 Saturn's you can flash the codes out 1996 and up is obd2 which you need a code reader. Code readers are pretty cheap these days.I have a little pocket reader that has some live engine data.I use that for quick code reads. It's like 50 or under its a good investment.