98 ford escort zx2

My cars started out dieing out once it was put into drive. I’ve done some research and got several answers. We think it might be the torque converter. There is no code to pull. It idles fine in p,n and drives fine in reverse. We checked for vacuum leaks and didn’t find any. Once the car warms up it will drive but very rough. Is there something we haven’t checked yet or is there any thing else that might be the problem. The transmission was rebuilt about 3 years ago. Thanks for your time.