Bad noise from rear of the car
 

Hi, I have a 2005 AT. Last few months I replace the coils, plugs, and plug wires, also the engine coolant, tranny fluid and deferential oil. since then the car ran absolutely great!

Then I took a long vacation last month and left the car outside of my apartment(the only place I can park the car for that long). After four weeks I came back and the car started to make a rustle/ grinding noise. It's kinda like a squeaking noise or sometimes like a rubbing noise.

The noise becomes especially obvious when I release the gas pedal, or switching from parking to reverse (or from R to N, N to D, etc.), or let the car run without pushing gas. Speeding does not seem to make it worse, but the noise happens no matter which gear I was using.

It comes from under the rear seats or the trunk I cannot locate the exact place. At first I thought some drive will bring it back to normal, but now the noise comes worse and worse. Anyone has an idea where should I look at?

Other than the noise everything else is fine, good millage, no power loss, etc.

great thanks in advance!

Sounds like it could be the u-joints in the drive shaft or something wrong with the differential or transmission. You need to get it checked out if you aren't able to do it yourself. It would be best to do it before something breaks and causes more problems as it fails

Could it be a wheel bearing? Do you hear the noise outside of the car?

yes I could hear it from out, I will let a friend to help me tmr. with myself I can only tell it's from the rear, feel like from the passenger side

I will check it next week. Hope the dealer won't empty my wallet this time.

I m just dont understand why the hell the car suddenly became this bad, since I didnt drive at all during this month

Who knows man, it was probably something that was already going bad but got worse with the car sitting for a while. Anyway if it's a wheel bearing, you can jack up the rear of the car. Sit in front of your wheel, and grab a hold of the tire from top to bottom and push/pull it inward and outward. If the wheel moves at all (wheel play) it probably is your wheel bearing that's bad. Test both tires, if it's a wheel bearing it shouldn't be too expensive to get fixed. I just had my front wheel hub assembly replaced cause I had a bad bearing. Every time I would make a right turn I would hear it squeaking also the wheel had some play. The rear might be a little different, but if you hear the noise while the car is moving then there is a possibility it could be that.

First thing I thought of is rust built up on the rotors. It happens to my car as well as I pretty much only drive it on the weekends. It may go away in a few miles if so. It does for me.

that's what I thought first, but now I have driven it 50 miles after the noise and it's getting worse. That really freaks me out and I don't dare to drive it any more