1995 eng code 37

I got a code 37, torque converter soelnoid ctk, and my neon has not been shifting right. I will run at 75 mph@4000rpm and it will not shift up. I got the torque converter solenoid, but i need a diagram of the trans so i can change it. any advice or help would be great. I posted a few weeks ago about my neon not strating i changed both o2 sensors...good to go!!!