This morning i was warming up the balt threw it in reverse after it warmed up to 100 and it made this sound as if i was dragging the brakes on a wet rotor. But i was reversing normally and wasnt pressing the breaks. I had been driving in the rain the night before. I put it into first, no sound, back in reverse and the sound was louder, kind of like a metal dragging on metal ghoast "whoooooon" sound... anything you guys have had?

 

I also get that occasionally, maybe like once a month or two. I'd also like to know what it is.

 

I get this too in my '06 SS/SC! I figured it was the brakes also, but like you I don't think I was on the brakes.

Although, do you guys get it when it's dry? It has rained here for months so my wheels are always wet.

Ryan

 

I dont know, I only got it for the first time last night. Since then it wasnt driven in the rain and it was dry so im not sure. we need to know what this is and get it fixed.

 

bump

 

I had this too one night backing out of my garage after i washed it the night before . I just assummed it was the brakes cleaning the surface rust off the rotors that happens when they get wet and then sit for awhile .

 

without applying the breaks? ^^^^

 

Yep just rollin out the driveway

 

Ha i bet my reverse noise is worse than your reverse noise...https://www.cobaltss.net/forums/problems-service-maintenance-69/help-loud-grinding-metallic-scrapping-noise-40292/

OK but seriously I've had that noise too after washing my car and stuff.

 

I've only had this problem when it has been dry it, and mainly when I am turning the wheel slightly.

 

I have this problem everyday, its not too loud so i live with it and its only in reverse. Just the rear brake pads on my rubbing the rust ridge on the rotor...nothing too major. the pads re-seat themselves as soon as i get into forward motion.

 

Even when not applying the brakes... the pads are still in contact with the rotors...

After the rotors get wet.... rain, car wash etc etc... a thin layer of surface rust will form on the surface of the rotors...

It should where off after a 1/4 to a 1/2 of a mile...

Reverse sometimes makes a little more noise then first+.

-Rich

 

Happens only after I wash the car.

 

coming from the front or rear? do you apply your parking brake when parked? do you have an auto?

most people push there brakes when leaving from a just starting out situation. there will be some brake to rotor noise as the pads are still touching the rotor. its considered normal.

 

Another annoying thing about the brakes are after mine sits for a day or so after being washed and parked in the garage , when i first back out all the brakes need to be broke loose . Its like they are stuck to the rotors and actually make a slight pop before the wheels roll lol. My z28 and z24 did it too .

 

Wow, I had this happen again tonight, but this time it was REALLY loud like I'd say it was as loud as half volume on the stereo! It was a high pitch metal on metal noise, there has been no rain here for the last couple days. It is kinda freaking me out, my girlfriend really noticed it and she never gives a damn about anything to do with cars.

Hmm, I might have to take this in, it made the noise in reverse going up a steeper incline.

Ryan

 

The same thing happens to me, wet or dry, used to be only once or twice a month, now its about every morning I back up out of my garage it makes this noise. Im really worried about it, can we fix this problem? if anybody knows, Please help!!

 

Same thing for me, its usually a wetness issue (wash, dew, rain). It's just a ****-poor GM design. I know the G8 guys have the same issues and they HATE it. I would too if I spent 30k+ on a car and it sounds like...well...a Cobalt

 

haha my 06 g85 does this sometimes too. it scarred the **** out of me the first time. i felt it on my ass, i even rolled forward and back again. def happens when moist out. no biggy i wouldnt stress it.