I have to say that, as much as i like the Forza series, the sounds of that car are not as good as they could have been. The whine of the gearbox is missing completly. If you watch an onboard lap of these cars than you can really hear that grinding noise. The shiftsound is not as good as it should be as well. The engine sound on the other hand is good, not spot on, but quite good. Graphics is one thing but if the sound isn't working like it should be, the feeling doesn't start to come up as well.
I really follow the series as hard as i possibly can as an european, therefore i'm a little dissapointed with the results of FM5 in this area.