If you notice problems with your transmission, don’t automatically assume that the problem is actually in the transmission. Computers receive information from numerous sensors, process the information, and then signal/operate the transmission. Often, the problem is in one of the sensors, an electrical connection, or system ground. In such a case, any work on the transmission will not resolve the problem. Equipment called scanners can “read” the codes stored in the computer and help pin point the source of most problems.
Therefore, it is imperative that the entire control system be diagnosed before the transmission is attacked. As the commercial says, “It’s not you Father’s Oldsmobile.”