My issue is simular but a little different.
I get a hard shift from 1-2(ATX) from time to time but not all the time.
I've done the fluid change and it it seems to be a little smoother but nothing dramatic.
I've removed/poured in 8 quarts through the ATX in the last 2 weeks.
Any ideas or suggestions on improving this 1-2 hard shift ?
btw:
After shifting in to 2nd, all other gears are very smooth.