I have a 2009 redline, 5 speed manual,mostly stock minus a CAI, muffler deleted exhaust, and 255 tires. Lately ive been noticing a faint but noticeable vibration coming from what appears to be the transmission area at about 2000-2500 rpms and up. Any ideas what might be causing this? The car has 97k miles and its never given me any major issues yet, hoping this isnt the start of a big problem. Any help would be appreciated before i pay a shop diag fees. Thanks in advance!