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  1. #1
    imported_rob911
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    A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Has anyone ever changed the oil in their A3 Quattro Rear diff/heldex coupling?
    If so - do the 2 share the same oil or do they have seperate supplies?
    I have the heldex filter and the tubes of oil and need to press on.
    There apprears to be more than one drain and filling plug!
    Cheers
    Rob Justice

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  3. #2
    AndybS3's Avatar
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Here's a pic of the plugs

  4. #3
    imported_rob911
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Andy - are you correct with the drain and filling being the same plug? I thought you filled it through the level check plug.

  5. #4
    AndybS3's Avatar
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    The pic was emailed to me from Hans Berg from Haldex traction so I would assume it to be correct Rob

  6. #5
    imported_rob911
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    I will need to look further into this Andy - the drain and filling plug is the lowest part of the diff so I cannot see how you would manage to fill it using this plug.
    Did you manage to remove the Haldex filter - It looks very difficult with the diff sitting inside its cradle.
    Bloke at VW garage told me you have to break the old filter to get it past mount - new filter is a 2 piece job to allow you to fit it.

  7. #6
    AndybS3's Avatar
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Here's another pic of the oil being refilled from the Audi service manual. I haven't changed the filter but according to the same manual you need an Audi tool which looks like a spanner bent at 90deg

  8. #7
    AndybS3's Avatar
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Pic of filter change

  9. #8
    imported_rob911
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Take my hat off to you Andy - I suppose the special oil used must be very thick when cold - almost like a grease allowing you to refill it through the drain plug and it not draining away.
    Also I take it the diff and coupling use the same oil?

  10. #9
    imported_rob911
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    Re: A3 Quattro Rear Diff/Haldex Coupling Oil Change

    Andy - the document detailing the oil changed - is that from the workshop manual?
    Where did you manage to get a copy? I have tried dealers but so far had no luck. I have been informed you can get copies on e-bay etc.

 

 

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