Shifting irregularities

I aquired this car about a month ago. Aside from incredible paranoia about the tranny all seems to be going ok.

I have, however, noticed something that is beginning to concern me. It seems that when the car is shifting from 2 - 3 the car decellerates during the shift. I have had the tranny flushed and the external filter replaced in the last 1.5 weeks. The only difference I've noticed is that the shift from 1 - 2 doesn't "jolt" any longer. If I really put my foot in it I take off like a rocket. If I accelerate gradually I get the symptom that I just described.

I've read about a "Brake Band" adjustment screw on the tranny case. Is this something to experiment a little with or am I about to take 401K money out to keep the car going.

The fluid installed is ATF 3. The car is a '92 w/99k miles.

Any information is appreciated. This is my first auto tranny in 17+ years. So I am pretty ignorant of the mechanics of it.

Randy (ii)