Ok I was cleaning the grounds on my negative battery cable and I dropped the nut that attaches to the back of the block where there's an opening close to the speed and reference sensors. And since I can't locate it, I'm not sure what to do to check it out. I've went all over and under with my magnet and even removed the starter just to check if it dropped around it. The magnet I have is too big to poke down in the hole to feel around. It's and automatic. Anyone else have this happen or idea's on what to do. Thanks in advance...