I have made the mistake that you might be making before. It is very likely that there is a vacuum hose going from a switch of sensor on your transmission going up to your intake. If so, find it and remove one end and see if there is transmission fluid in it. I found this to be a problem in a Thunderbird that I used to own. I removed the entire transmission to find out that I only needed to replace an inexpensive switch. It just sucks the transmission fluid into the intake and burns it. It does keep the intake valves and top of the pistons lubricated though.