Since About 3000 miles (I'm at 20k miles now), I've noticed a strange "knocking" in the rear suspension.
I took it in to Subaru shortly after it started, and they couldn't find anything.
I took my back seat out, thinking the top strut mounts might be loose... they're not.
Its like the bushings are "sticking"... but they all seem ok, and none are rotted or anything.
I drove the car all winter...
The degree of noise varies... its mostly bad the morning after it sat through a rain storm... but it is consistantly there.
All along it has been on the drivers side, but now it is starting on the passenger side as well.
I've had the Subaru dealership check it out three seperate times, and each time they can't find anything wrong and just tell me that its the extra noise the polyurethane makes, but this is NOT normal extra suspension noise - I know what that sounds like.
I can make the car make the noise by pushing down on the back of it.
honestly, the only time Ive ever heard the noise in any other car was when the top strut mount was broken, and mine isn't.
I've emptied my back seat and trunk, just to eliminate the whole "stuff flying around" error.
the car doesn't handle any differently, but when it settles after stopping, you can "feel" the noise, like its binding or something.
Anyone else experiencing/experienced this? Any ideas on what it might be? Is it time to start re-lubing everything? I know polyurethane takes extra maintenance and a different kind of lube, but I thought that was just because of a squeeking problem, not thumping.