Too clarify this is not the wind sounds or deflated tires or sound mods! When I go really fast and the gear shift it goes like this: vvvvrrrrrrrrrrrrooooooooommmmmmm-che-vvvrroom.... What is that sound? And sometimes there is a diffrent sound when I stop accelerating it kinda sounds like bumping. I have no sound to show you because I dont know how to that. I don't know much car stuff so I can't identify these without help.
Its not a bug or anything. I think its like some dynamic engine sounds or some weird thing like that. I don't mind that these happen but it you can actully hear it in some of the official youtube channels videos --- Post updated --- at 0:49 and until that segmant ends. You can also find a similar sound at 0:39
the "che" sound is just the game sound effect for switching gears. i can only reasonably assume the other sound you're referring to is turbo whine, which is also enhanced for effect. well, on the average game stock cars, anyway.