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Vibration from the diff?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by DAZ1985, Jan 19, 2012.

  1. DAZ1985
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    DAZ1985 Member

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    I have a vibrating noise from the diff (sounds like its dragging) when in first gear on full lock?

    I have changed the diff oil (used genuine Audi stuff)

    Made no difference

    Seems to get louder when it's warm after a long journey

    If the diff is shot :( would a diff off an allroad a6 fit?
    #1
  2. Turkster
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    Turkster Bro.Paul 2.5TDI Quattro Sport

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    all i know about diffs is its best to change "like 4 like" as they can off set your speedo and quattro set up,
    #2
  3. towcestervag
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    towcestervag Member

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    they all do it
    test drive another but they all make a noise on full lock pull away
    #3
  4. DAZ1985
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    DAZ1985 Member

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    It's the same engine, just auto on the allroad mines manual, but I'll take that on board. Thanks
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  5. olly quattro
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    olly quattro Member

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    They defo all do it
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  6. DAZ1985
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    DAZ1985 Member

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    Seems strange they all do it, sounds wrong.

    Is their a reason why? Or should I stop worrying about it and accept it how it is?
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  7. towcestervag
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    towcestervag Member

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    its the diff winding up
    it working hard when on full lock
    if you think 1 wheel is nearly stationary and the other is moving quite a distance so the diff is working at its optimum hence the noise
    been with audi since the original quattro and before and they have all made this noise
    So dont worry!
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  8. DAZ1985
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    DAZ1985 Member

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    Reason I ask is me dads s3 doesn't make the same noise, nothing like it
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  9. jbcalvin
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    jbcalvin Member

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    4WD drive system on the S3 is totally different to the A4, S3's are FWD until slip happens and then power sent to the back using the haldex system......

    A4's use old school permanent 4WD with torsen front/centre/rear mechanical diffs which are pretty much bombproof, worked for VAG for over 10 years, never saw a diff failure......
    #9
  10. quattro tony
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    quattro tony Member

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    I know the s3 doesnt have the same diff as the a4. The s3 has a haldex which only sends power to the rear wheels when required so most of the power is sent to the front in normal conditions.How old is ur dad's s3 btw?
    #10
  11. DAZ1985
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    DAZ1985 Member

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    If you all it's fine I'll go with that

    S3 on a 59 plate tony
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  12. quattro tony
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    quattro tony Member

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    S3 still should be a haldex as mentioned above. I would go test mine and report bk but i carn't as ive just traded my a4 quattro in :bye: , i think mine did it on full lock aswell.
    #12

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