Transmission slipping in the hot weather only

I have changed the Valve body and shift control block and all the sensor. Now the car moves in first gear but It does not shift into second gear. After first gear when It try to shift into second it feels like in neutral. I am getting three codes P1607 P0700 and P0732. I think it is maybe because of bad PCM.
Please Help

Hello sir, I changed the whole transmission. I replaced the transmission from Pick a Part. I had 80k Miles on it and it is pretty good condition. I added new fluid and filter in the transmission. I also changed the old the electric connection to the transmission. When I start the transmission for the time it shifted into the drive, reverse and other gears fine. Then I drove about 3 miles and it was shifting very smoothly then it started acting weird. The first thing I noticed it started delaying the transmission gear. For example 4th gear is supposed to shift at 45 mph but it wont shift until 55 mph. Then I stopped in parking lot checked the fluid and it was at good level. Then I started the car again and I noticed it engage into drive late. When I shift from park to any gear it takes about 2 to 3 seconds to engage. And then it started jerking when shifting. Everything was fine first 3 miles. But then It was acting weird. I even cleared the any codes before the starting the car for first time. The code that I am getting is Trouble code P0700 MIL Request and Freeze frame Data P0732. These codes were coming from the old transmission. I cleared it but then came back on. It shift in and out of 2nd gear but not very smoothly. I am assuming that it is the computer gone bad. Please help me so I can fix this car. Please Help me sir