not sure what it is. 1986 ea81 hatchback 4x4.

i had a chevy s10 pickup that had torsion bars on the front, and when the rubber mounts for that went it made the same kind of sound. its like a hollow low pitch rattle, that is very noticeable over bumps, and is starting to make noise on the highway.

is there any thing with the torsion bars on the rear that could do this?

check your u-joints

hmmm, how about....

 

front diff hanger bolt being loose?

 

probably would hear that when you put power to it though

 

i made a trailer hitch, and the muffler bangs against that under hard shifting,

but thats an unmistakable sound.