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My S4 rear diff is leaking badly. Anyone got a spare?

Discussion in 'A4/S4 forum(B5 Chassis)' started by SonicDeathmonkey, Oct 1, 2009.

  1. SonicDeathmonkey
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    SonicDeathmonkey Member

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    [Oct 1, 2009]
    So that garage did all the work on the car (aux belt, rear springs and the things they fit into, service, CV gators).

    They said that the "whirring" from the rear was most likely the rear diff. It's been slowly leaking oil since I bought the car 8 years ago! Anyway, they had a good look at it and filled it back up with oil, but say that the seals (3 of them?) are gone and that the leak is bad enough to warrant replacing the diff.

    They said that you can get recon units etc. They didnt seem to think the diff could be "fixed". Does the above sound right? Any ideas where I can get a new diff? How much should I expect to pay?
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  3. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    Why not just change the seals? although i guess that will depend if its now quietened down, or if its still whining.

    If its quiet with new oil in there, then i'd replace the seals. I'm sure someone on here did it before, i remember looking for craig (his diff is leaking too) but i dont remember if i found it or not.
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  4. SonicDeathmonkey
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    SonicDeathmonkey Member

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    [Oct 1, 2009]
    Still whirring, even with new oil, so I guess it's toast.

    I just dont want it to lock up on me, when I'm on the motorway!
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  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    as long as it has oil and the noise doesnt get any worse, it'll probably stay like that for quite a while. If its still whining though, its likely the lack of oil has worn some of the bearings inside.
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  6. SonicDeathmonkey
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    [Oct 1, 2009]
    Yeah, so it brings me back to getting hold of either a new one, or a recon unit. Cost of either option is unknown at the minute
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  7. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    I think Docurley has a TQS one, i am sure the final drives are the same so a bolt on replacement
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  8. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    Make doubly sure the final drives are the same, or you WILL break something expensive.
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  9. SonicDeathmonkey
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    SonicDeathmonkey Member

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    [Oct 1, 2009]
    Great! How do I find out if they are the same? I though you guys knew EVERYTHING about these cars!
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  10. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    Last edited: Oct 1, 2009
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  11. SonicDeathmonkey
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    SonicDeathmonkey Member

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    [Oct 1, 2009]
    cheers dude.

    Anyone know where I could get mine refurbed?
    #10
  12. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 1, 2009]
    #11
  13. Siena
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    Siena Active Member

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    [Oct 1, 2009]
    Search for a 2,6 quattro differential - it's the only B5, bar the S4 that is a 37/9 (4.11:1).
    #12

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