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?