Automatic boxes

Hello friends I need to help me because I have problems with my box, it is a Blazer Mod truck. 95 Vortec Motor 4.3, because I tell you that a few days ago it was very trankilo in the city and stopped stopped making the change, Hata that started running a little more reaching the 3000 RFEV. I release the accelerator and already make the change to know what your suggestions be revealed very much in

When the marches are lengthened in automatic boxes, it can be available to many factors by committing the oil, that the valve body is not working, spent discs, stretched springs, or even a bad electrical connection acia the box connector, to be able to check the only shape is to remove the box and open it.