I've started noticing a groan/creak/croak around the area of the transmission whenever I accelerate from low speed on my '13 WRX. My car already has it's fair share of squeaks, but this is not as high pitched and sounds a little more serious; like metal on metal rubbing or something bending that shouldn't be. Can anyone give me some pointers on where to look to root out the problem?
It doesn't seem suspension related, since general bumps don't make it happen. I can reproduce pretty easily if I blip the throttle in first gear and make the car jerk forward a bit, but in general it happens most of the time that I accelerate from a stop.
I'm no car expert, but it sounds like the motor or transmission mounts are under too much stress when I accelerate. Even if I'm not pushing it too hard.
Car is stock, except for cobb shifter bushings (front and rear). I did hit a decent sized speed bump too fast a few weeks back (couldn't see it), but haven't had other symptoms. Nothing looks obviously damaged around there.
Is this just the usual WRX groans and squeaks that everyone talks about or is this something fixable or worse, really broken?