What is this noise?

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Old Dec 26, 2012 | 09:30 AM
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Default What is this noise?

This is the problem I have been having over the past month. It sounds like its coming from the rear diff but I doubt it is it because the noise goes away and comes back and there is no difference in acceleration.
This is inside of my car.

This is outside my car, rotating the tire left and right.

Has anyone had this noise before, it went away on Saturday for about 3 miles then came back louder than ever, It is louder when I am rolling in neutral.

Last edited by jbasilio95b4; Dec 27, 2012 at 11:09 AM.
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Old Dec 26, 2012 | 03:53 PM
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its eather a wheel bearing or a CV joint
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Old Dec 27, 2012 | 02:34 AM
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yep - sounds like a CV joint to me.
jack it up - shake the axels - u should locate which 1.
make sure ur tires / rims are tight as well - lose rim can hit brake caliper
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Old Dec 27, 2012 | 11:18 AM
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How would you check a rear CV joint? I checked them and they didn't have any play. The noise was only there when I was moved the tire left and right short distances. I also thought it was the rim when I first heard it, but I have taken it off and tighten it many times already and nothing changes. It goes away when I jack up the car and look for the problem then it comes back after I drive a few blocks, its teasing me.
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Old Dec 27, 2012 | 02:07 PM
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did you say your wheel moves sideways?
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Old Dec 27, 2012 | 02:17 PM
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No I meant forward and backwards. There is no play in the wheel.
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Old Dec 27, 2012 | 02:19 PM
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This is what I meant and it also makes the noise on the right side too.

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Old Dec 27, 2012 | 02:41 PM
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that sound comes from eather your cv joints or the diff, to test joints, grab the axle and try to rotate it back and forth, if you hear and or c that there is play between the axle and the joint, then you know its your cv joint. have you checked your oil level in the diff?
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Old Dec 27, 2012 | 03:10 PM
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I found a write up on it and I will attempt tomorrow. I hope the fill & drain holes are not to rusty.

Note: The write up is for an A4 but it looks like my diff, in the event that my the noise is coming from my diff, do you think the rear diff from an 1996 a4 would fit my car?

Last edited by jbasilio95b4; Dec 27, 2012 at 03:17 PM.
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Old Dec 27, 2012 | 03:28 PM
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B4 and B5 rear end is the same in physical dimensions, BUT i dont know what the gear ratio is in the one your looking at and the one you have
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