So far, I've asked about my heater blower and my rear dif, and maybe something else. I don't recall. So now, I have a new question. I heard a noise in the back, and figured it was a rear dif issue, so I asked here. And it was suggested it was either the fuel pump or the rear dif. Because of the description of the noise I heard, I was told to check the rear dif lube level. So I checked it today, and it was low (I don't know HOW low, but it was low). So I filled it and it seems to be better now. But now I hear a different noise. And I do realize some of that might be just me being paranoid, but I'm not sure. When I started it under the deck (enclosed) I heard what sounded like my heater blower motor fan on coming from the back. When I would drive, it would be drowned out and eventually go away. And sometimes when I am at a stop light, it appears again. It does not change based on my speed, the speed of the engine, or if I'm coming or going. If I pump the gas pedal, it makes no difference either. My friend says it doesn't sound like a fuel pump issue (I'm hoping it's not, thats not cheap to fix) because it doesn't have the sound to match what he thinks it sounds like (and because of the amount of gas I have in my tank, almost full, it doesn't sound like a pre-pump issue either). Any ideas?