Your transmission will show many signs when it has started to go bad. You don't want to ignore those signs because it will only get worse. A lack of response is something that you should look out for. It should not take you a long time to shift gears. This problem may be caused by a mechanical or a hydraulic problem. Some people say that the transmission is slipping.
You should also pay attention to the sound that your vehicle makes. It is normal for your vehicle to make some noise. However, it should not make a whining, buzzing or humming noise. This is likely caused by the transmission. Additionally, you may notice that there is a fluid leak. If there is not enough fluid, then there is a chance that the vehicle will overheat. You will likely notice a bright red pool of fluid under your vehicle.