Finally got to the transmission filter change today. In the process of taking out the 17 bolts in the pan, one of them rung off in the transmission housing (oh joy). Will attempt to drill out and remove with an extractor. If that doesn't work I'll have to drill one step bigger and tap hole. Also, I found an odd object laying in the pan when I removed it. It's a little yellow plastic piece about an 1-1/4 long with a conical end with an O ring on it. The other end is a 3/16 shaft. I have no idea what it is or where it came from!