Clunky Rattle - Ideas?

[Clutch]

Hey everyone.

So for the last few weeks on my Impreza I have been noticing a sorta of rattling noise coming from what I think is the back passenger side.  I backed onto some ramps and poked around at it this morning, but couldnt find anything that seemed out of sorts.  I only have ~57k on it, so I would hope its not a strut gone bad already, but none of the bushings or ball joints seemed wonky from a visual inspection.  I did add a WRX sway this past winter, and was thinking that maybe it was a loose endlink, but all the bolts were tight.

Any ideas? 

[20 BLK WRX 04]

When does it usually happen?

[Clutch]

I can only ever hear it when its at low speeds (still have snows on, running them out for the summer), so its when Im pulling into my driveway or a parking lot is when I notice it most.  Ill take a ride this morning to try and see if its turning or suspension movement that seems to make it loudest.

EDIT:  So it seems that I hear it most when driving in a straight line at low speeds. 

[Kavik]

Walk around back and kick your muffler.
Could be exhaust rattling on the new sway bar? It's a long shot, but i've had that happen...and it took me a while to figure out, i started with looking at all the suspension stuff too.  The fix was simple: aftermarket hangers

[Clutch]

Ill have to give that a shot and see if its the muffler....  Didnt even think of that!

[Clutch]

So, of all things, it turns out it was actually the seat back...  It doesnt latch tightly, and at slow speeds it rocks on the hinges and sounds like a bad strut...  Fold the seat down, noise goes away. 

[Kavik]

  always the least expected thing