2004 Ford Taurus X - Help with repair steps

intermittent rough 1-2 or2-3 shift taurus 4x4n trans,remember fixing these concern when I was working for ford years ago, I can not remember the repair steps, I know it was replasing a spring,an old tranny guys outb thereb that can remember let me now

I’ll bump it up. Maybe someone knows but since transman left some years ago, not a strong point here. He’s down in Georgia someplace and messed with transmissions just for fun.