Noises from 3400 Ram Air?

[01GrandAmGT]

Sometimes when I get up to about 5000-5200 rpm's before it shifts to the next gear. It sound kinda rough. I don't know the sound exactly, but I have been told that's the sound they make.

Also, When I took the car to the dealership over a slight knocking noise about 1000-1200 rpm's they say it is something near the manifold. And all GT's do that. Is that true? What specific sounds do most of them make?

[01GrandAmGT]

Maybe a marble sound? Depends on the type of gas and where I buy it from too, sometimes the sound is there sometimes it's not, also with the pecking at 1000-1200 I don't know what that is at all.

Anybody????

[GAGT12k]

i got a knocking noise in my engine, similar to what you have but that is how mine started out... ive been told its a stick valve.. been told its a bent rod... it started around 40k miles and now i have almost 93k... the knock is alot worst but the car still runs fine... idles a little rough... u can do much just from a sound.. one sound can mean a 100 different things... so ur gonna have to go with what they say... and make them write it down so u can screw them with it when they say they told u there was nothing wrong with your car... especially if you brought it to the dealer...