Hello I have a 07 g35 coupe manual I hit 7k miles the other day... my brakes seem a little spongy. It is kind of hard to explain... when you rev past 4k (manual not automatic) it gets kind of shaky well now it seems a little (emphasis on the little) a little shakier when I am shifting normally.. I am just not getting that UMPH smooth feeling anymore... I am getting my tires rotated today... I always shift at around 3,000-4,000 rpms, and have never stripped gears or over reved (well maybe over reved about 5 times in neutral jus to show off) but I have never really done anything to mess this car up? any ideas? a check up maybe? the dealer is about 1.5 hours away Thanks!