I've searched can't get a clear answer because the noises posted are completely different from the ones I get. Alright shortly after installing lowering springs on my car (Eibach Pro-kit), I noticed when I was reversing that there was a faint rattling noise, akin to a soda tab inside the can rattling around, or someone tapping lightly on a marble table...(?) it's a *tick*tick*tick* noise coming from back left. Pulling the e-brake helped and the sound went away. A couple of weeks later I changed my brake pads in the rear. The noise is back louder than ever! Now it sounds like someone just got married rolling down the block, with a bunch of pebbles inside soda cans... exaggeration but that's what I imagine when people stare for the wrong reasons . Anyone have any idea wth could be making that ticking noise?

 

Wheel bearing. Pulling the E-brake gives some support to the drum/rotor, and takes a little load off the bearing itself, so the noise goes away. Lowering the car changes the angle of loading on the bearings, so that's probably why it started right after that.

Another possibility is the CV joint on the rear axle, since it has to move more with the car lowered.

My money's on the wheel bearing, though, just based on your description. How old is and how many miles are on the car?

 

Bring it over to http://www.paladinadvancedauto.com/ and have them look at it. Mike (the owner) is a Nissan master tech, and they are the shop our local Z community uses.

 

Found the problem. Month or so ago a friend helped me change some studs on the side with the sound in question. Today I jacked the back took off the wheel and rotated the rotor and heard what sounded like there was something inside loose at the bottom. I took off the rotor and lo and behold one of the retaining clips came out of its spot and was pressed between the dust shield and brake shoe. The guy who helped had installed the springs on the wrong side and the retaining pins weren't holding in place. Easy enough fix luckily I caught it before anything serious happened. Hurray for troubleshooting!