Well, a miracle happened. I was working on my new air horn, and i got it all put together and i was going to go for a drive and say F the damn gear. and when i went to put the old sensor back on, the little gear was sittin there right on top of everything! so i was able to position it back in its little hole and put the new sensor in. turns out it still don't work, so i'm assuming that its something in the transmission. a weird thing was when i put that gear back in its little rotating spot, it didn't even want to turn. and it didn't look like it made contact with any other gear.. sooo. i dont' see how it would turn the sensor.