I remember you pointed that out, but it wasn't rattling before, it presented itself yesterday afternoon. When I first heard it, I thought it was something internal, which I guess could still be a possibility. How low would my oil need to be to do any kind of damage because that's what I'm most worried about. I pulled the dipstick and the oil was right below the low oil reading, so I topped it off with 2 quarts and its reading a little above the high mark on the dipstick. And what could that tranny line be hitting that would cause the rattle to be in sync with engine speed? It sounds like metal to me.

I guess the circuit board could be damaged, but as far as I know that's the stock cluster that came with the car. I'll take a look at the cluster when I get a chance. I very well could just need a new battery and that's why the battery is draining so quickly.