Box Automatic Changes of 406 2.0 HDI 2001

Hello good morning. I have a problem with my automatic gearbox. It is the Peugeot 406 gearbox of the year 2001 2.0 HDI. I think the model is the AL4. The problem comes when the car reaches the temperature of 90º, at that time when the car stops for example in a traffic light and resume the march hits a very annoying pull. I also notice when I step on the pedal almost stopping the car, taping as if it stops dry or the march came out and then resuming what was said, hot. I have to say that we have changed the valve body and continues to do it. Any help? thank you so much