Hey guy's, well I'll try to explain it the best I can.

About 2-3 Weeks ago I put in new aftermarket break pads for my G, and about 2 days ago there is this odd sound coming from the rear left side, it doesn't happen all the time, it usually happens when i do a lot of driving and it goes away after i put my car on park. I don't really know what it is but all I know that it isn't normal. I took it to my mechanic when it wasn't making any sound and he said everything looks fine.

Any Ideas?