Loud whining noise in the trunk. Help plz.

[isramirez21]

Hello everyone.
Here is my problem, there is a loud whining noise coming from the trunk whenever I speed up the car. It increases as I go to higher speeds and lessens when I slowdown. I don't know what it is, or something is going wrong...
Some people told me that it could be the amp's fan, but I realized later that it doesn't have a fan.
I dont know where it comes from and its very annoyingI have to turn the music loud so my passager doesn't complain that much.

Anyways if any of you have an idea where the noise is coming from, and how to possible fix it, could you please let me know?

Thanks so much

Israel

[dmott11]

i have no idea but what i would suggest us that you have someone sit in the back seat with them folded down while you drive so they can find it. goodluck

[isramirez21]

i have no idea but what i would suggest us that you have someone sit in the back seat with them folded down while you drive so they can find it. goodluck

Thanks for the reply.:-)
I have sat in the back seats but its very confusing how to tell where it comes from I'd guess and say it comes from the right side where the amp is located;however I have looked there and I dont see anything that is causing the whining noise. I think its coming from somewhere inside.....idk where

[djwimbo]

Does the noise change if you're on accel or engine braking? How about loading the suspension during a turn?

Quattro equipped car? Check your fluid in the rear diff.

[datacrime]

Are you sure its not your wheel bearing?

[FourBlackRings]

im gonna say its your wheel bearing i have the same problem it gets louder as you accelerate and quieter as you come to a stop because the wheels are speeding up or slowing down.

[isramirez21]

Does the noise change if you're on accel or engine braking? How about loading the suspension during a turn?

Quattro equipped car? Check your fluid in the rear diff.

Thanks for helping man.
The sound changes and becomes louder when I accelerate faster. It's like the cooling fan of a motor, but with a different sound. i start hearing it when I'm in like more than 40mph....
It is an A4 quattro 1996 2.8, so which fluids do you want me to check?! ( sorry I dont know much about cars)

Are you sure its not your wheel bearing?

I'm not sure. How do I check if its the wheel bearing?

thanks

[NyteEscape]

hmm, any chance it could be a fuel pump? maybe someone else will chime in, cuz i cant be sure...

[isramirez21]

im gonna say its your wheel bearing i have the same problem it gets louder as you accelerate and quieter as you come to a stop because the wheels are speeding up or slowing down.

That is? Did you get it fixed already!? if so how much did you pay for the work?
btw how do you know that the wearing wheel is? for the noise?! sorry for making so many questions...

[Greyhound Guy]

Does the noise change if you move the car side to side like changing lanes.

[pipe7284]

do you have woofers installed in your car? if so , the cablesthat runs from the radio to the box might be causing this sound, its like a supercharger sound, but in a lowrd pitch level. you know what i mean.

[djwimbo]

Thanks for helping man.
The sound changes and becomes louder when I accelerate faster. It's like the cooling fan of a motor, but with a different sound. i start hearing it when I'm in like more than 40mph....
It is an A4 quattro 1996 2.8, so which fluids do you want me to check?! ( sorry I dont know much about cars)

That sounds like a wheel bearing to me.

Find an open road, or a curvy road that you can go 50mph on. If you can make a slow/wide turn at that speed and the noise changes depending on your turn(left or right) it is most likely the wheel bearing.

If your noise remains the same or gets louder on a left turn, the right suspension is loaded, it would be the right wheel bearing. If the noise gets louder or just remains the same on a right turn, the left side suspension is loaded, and it would be the left bearing.

You don't want to be swerving around as fast as this little guy , but probably half that speed. You shouldn't need to turn the wheel more than 40-45* to figure out what side is the issue.

The "swerving" can be done a 2-4 lane road if it's empty, but I do NOT recommend it if you don't know what you're doing. I do it on customer cars often, but I know what I'm looking for and I know the tricks well.

Just make sure it's coming from the rear. The rear wheel bearings can be a pain if you don't have the right tools.

[airy52]

whining noise in the trunk huh?

any kids or hookers back in there?

[Das General]

I'd guess fuel pump.

[audiluxary]

Does it only happen when your radio is on? When you turn your radio off does it go away? I have that and it is from shitty wiring, I have after market rewiring for all my speakers and I get the same noise, it gets kind of annoying somtimes but I have learned to live with it. Maybe some day when I feal like messing with the wiring I will fix it, but for now I hate wires.

[isramirez21]

Ok. I know that the noise its not coming from the wheels I already checked the wheels if they were loosen, they seem ok, I think its not the bearing wheel. The sound remains the same when I do turns in high speeds. Im not sure if there is another way of how to test it.

The sound still there whether the radio is on, or off. I have also disconnected the amplifier to see if it was causing the noise, but the noise still there. I have stock speakers and radio. The sounds doesnt come from the speakers either. I'm kinda lost.. I can't tell where is coming from....
Does the alternator?!
Thanks everyone for the help. :)

[isramirez21]

Does it only happen when your radio is on? When you turn your radio off does it go away? I have that and it is from shitty wiring, I have after market rewiring for all my speakers and I get the same noise, it gets kind of annoying somtimes but I have learned to live with it. Maybe some day when I feal like messing with the wiring I will fix it, but for now I hate wires.

When I first bought the car (about 7 months ago) I thought the noise was normal and I could Live with it. Now every friend who sits in the back seats complains about it. Now well I don't think its normal.
I have learned to live with it but its annoying anyways, now i want it to go away. I dont know where to start looking
Thanks for the help. :)

[datacrime]

I had the exact same problem with my 2.8.... Get it checked out from a mechanic. My problem was the wheel bearing... If you hoist the car up, spin the back tires as fast as you can, you will hear some noise... I suggest getting it checked out because if it is the wheel bearing making the noise and you have been driving for 7 months it is dangerous.

[isramirez21]

I had the exact same problem with my 2.8.... Get it checked out from a mechanic. My problem was the wheel bearing... If you hoist the car up, spin the back tires as fast as you can, you will hear some noise... I suggest getting it checked out because if it is the wheel bearing making the noise and you have been driving for 7 months it is dangerous.

Thanks.
I'll do that today. btw like how much did you pay to get it fix?
Thank you.

[isramirez21]

I Just checked the rear wheels, and you guys are right! It's the driver's rear left wheel bearing.

I want to thank all of you for the support on diagnosing my problem. Thanks
btw like how much does the wheel bearing cost? I'd like to change it myself, so id like to know like how much it cost.

I just found this on ebay: http://cgi.ebay.com/ebaymotors/Audi-...ayphotohosting
Is this the right one?


Again thank you so much.

[tamadrumr88]

that is but you can find it cheaper elsewhere. figure about 2hrs labor at a mechanic, a lot of people have attempted it themselves on here but it's way more of a pain in the ass than taking to a mechanic who has all of the proper tools

http://www.pap-parts.com/prodinfo.as...0598%20625%20A I refuse to deal with ECS unless pap-parts does not carry that part, otherwise I deal exclusively with pap-parts

[A4Quattro > all]

Check your wheel bearing. My winter tires had the same problem. Annoying.

[slopoke]

wouldnt be the fuel pump would it?

[A4Quattro > all]

Doubtful.

[le91688]

Take that hooker out of your trunk, shes prolly makin all the noise

[isramirez21]

that is but you can find it cheaper elsewhere. figure about 2hrs labor at a mechanic, a lot of people have attempted it themselves on here but it's way more of a pain in the ass than taking to a mechanic who has all of the proper tools

http://www.pap-parts.com/prodinfo.as...0598%20625%20A I refuse to deal with ECS unless pap-parts does not carry that part, otherwise I deal exclusively with pap-parts

Yeah I was reading that is a pain to change it if I don't have the right tools so I'll take it to a mechanic instead. Thanks for the link....

Thanks

Israel

EDITED:
I called the shop today and they said will charge me $270 to change the rear wheel bearing. (-100 if I get the part) Does that sound ok?

thanks