A904 Hard 1-2 Shift and Reverse

I would recommend before you start shotgunning the issue be sure you have an issue.

IMHO go back and adjust the kick down PER THE FACTORY SHOP MANUAL.

THEN run through the diagnostics as outlined in the FSM for shift points and feel

For all you know a previous owner installed a shift kit.

Also what are you comparing to, to determine your shift is too firm.