Whenever i back up with my car, i hear a chirping sound, like metal rubbing against metal...., But the sound comes and goes,,,,I can hear it for like less than a second and then it goes, and then comes back. But this happens just in reverse

 

HUMMMMM not sure would need to know more.

 

I dont know, it comes from the back of the car, its like the sound the brakes make when they need to be changed, and you press down on them and you hear a high pitch sound, sounds exactly like that, but the weird thing is that....IM NOT pressing the brakes :S

 

Maybe the spring for the Rear pads isn't seated all the way and scrapping on the rotor.

 

Hmm maybe, but why does it only happen on reverse thou?

 

Not sure does it only happen after the car sits for a while?

 

Yeah you can say so, lets say that i park it on monday at 5 PM, and i drive it again on tuesday at 1PM..

 

Might be slight Rust buid up on the outer edge of the rotor.

 

But ONLY in reverse? weird

 

Only one side of the spring might be hitting.
It might hit just perfect in reverse to make the noise.

 

what about the diferential?

 

er,....dont even know what that is

 

the pumpkin in the back that the rear axle comes out of. I've heard them grind in revearse on other cars.

 

Maybe