Transmission shifts to early after rear end gear change.

I changed my rear end fro 2.76 to 3.23 and couldn't get my automatic shift points back where thy used to be, they were shifting way to soon. I tried adjusting the kick down but it didn't seem like it was making much difference. Since the trans shop installed a shift kit when the trans was rebuilt I sent the car to them to work on, they upgraded the shift kit to stage 2 whatever that is, I though I had a TF-2 installed on rebuild. They made a bunch of adjustments and when I got the car back it seemed to be shifting right. I took the car out and ran it hard and it would not shift automatically at full throttle correctly. It wanted to hold 1st gear unless you let off a bit then it would shift the second gear shift point was at 4K at WOT, totally messed up. Before the gear change I had automatic shifting at 5k and normal operation. Anyway upon inspecting what the shop did I found my carb was not going full throttle as the kick down linkage was adjusted incredibly way to long. So I set the carb to full throttle and adjusted the kick down to be full back at full throttle. Now I am back to where I was before I took it in, gets into drive to soon at part throttle and full throttle up shifts are too early. I am wondering if I need to change the governor or if they just jacked something up messing with the valve body. Hopefully some of our experienced trans folks can point me in the right direction.