I've got a 2008 Cobalt Sport (2.4L, 5 speed) with only 4500 clicks (2796 miles) on it. I love my car but I'm getting kinda' ticked off.

When I first picked up my car, the synchronizer was apparently messed up and the dealership just ending up replacing the whole transmission. Everything was fine for about 2 months but now, whenever I accelerate, I notice what I can best describe as a kind of winding sound; similar to the sound that some manual transmission vehicles make when in reverse. Although I can hear the "winding sound" in any gear, it's most noticeable in 2nd gear. Any ideas what might be wrong?

 

you have a super charger and just dont know it

 

Lemon... thats odd.. Take that car back again and say wtf??? Don't think that tha Cobalt is a bad car sometimes even so called new cars have issues right off the showroom floor When i bought my 2.4L my muffler was shot but thats why we have warrenties.. Good luck

 

is that what that big silver thing under the hood is??

Yeah...I know. It's just frustrating because it's a new car. It's even more aggravating when ricers say, "that's what happens when you buy an American car".

 

lol yes

 

i kinda feel i have a similar sound from my engine, i just figure its the NA engine or maybe cause its a similar SRI design to the 2.4l balts. i only notice it while actually accelerating, which i assume its air intake.

 

if only there really was a big silver thing under my hood. lol.

The only reason why I suspect it's a problem is because it hasn't done it before. The only thing that I've done differently in the last little while is switch to higher octane fuel. I used to put the regular stuff in (87 octane) but read in the manual that putting higher octane is better for performance. I don't think putting in 93 octane fuel could really account for this sudden change????? The car does seem a slight bit faster though.

 

There was a thread about 2.2's making a whining sound as well as 2.4's, I've been in L61 Cavy's that do it too... dunno if this is the noise or something else entirely.

 

Now do u have any mods? intake maybe? My K&N sri makes a serious sound under hard eceleration but im sure thats just air being sucked in

 

Nope...no mods...yet