I have a '91 Dodge Dakota 4x4. When driving down the road i can hear a
"humming" type of noise coming from the back of the truck. No i don't
have big nobbie snow tires on it. It only does it while i accelerate,
when i let off the pedel it will stop. I also noticed when going around
a turn, it has a metal to metal "grinding" noise like the axle is going
to slide right out of the rear housing.

It sounds like the rear is shot to me. Anyone else have this problem or
know what it may be? I know it doesn't have anything to do with the
tranny or transfer case cause i had those completely rebuilt.
Any help would be appreciated!