Cavalier 99 Automatic

My car has an oak, every Q is going on some climb and I turn to the wheel to the left you want to put another speed, but it does not progress more but skates. Take it to scan and brand Q is the computer of the transmision or the passex. Consult others and they tell me that it is a speed module that comes in a velocity box. I carry with this problem since the catalyst was removed because it had been covered.

If anyone knows about this problem I thank you for your opinion.