Can someone help

[Eric Biehle]

I have a 2000 silverado 2wd with a 4l60e had the trans rebuilt like 20k who and started having a rough shift in 1-2, 2-3 read up on it so I replaced the tcc valve with the new oversized one now it only did it after I would drive for about 30min read a little more and saw that the tcc solenoid is a normal problem so I replaced it and now it only shifts hard going into 1-2 anyone have any ideas not sure what else to do or to check but shifts good until i drive for over 30 min 

[Supreme Pizza]

Automatic transmissions are a whole separate category of their own. I think you best bet is to keep "bumping" your post every so often, and keep Googling the issue. Sorry I cant be of more help.