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Changed a rear diff seal today - Pics.

PaulJC84 Jul 19, 2007

  1. PaulJC84

    PaulJC84 Owner

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    My rear diff as been leekin a tiny bit since I got the car over 3 years ago. It was not leaking much at all, no drips or anything just making the diff damp. But thought I would change it anyway.

    Here is the diff before I started.

    [​IMG]

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    Getting the old seal out.

    [​IMG]


    Bits off.

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    New seal and a pic next to the old one. Can see its quite worn.

    [​IMG]

    [​IMG]


    All done

    [​IMG]

    [​IMG]



    Also got home to find my new tyres had arrived for the powdercoated alloys so went and got them fitted.

    [​IMG]
     
  2. audii

    audii Member

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    i have to do my diff seals soon how did you pull out the dive shafts i heard a puller is needed
     
  3. PaulJC84

    PaulJC84 Owner

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    My one just came out i think, may have used a crowbar to pull on the lip a tiny bit first of all.
     
  4. Markey

    Markey Active Member

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    Looking very nice mate :) so clean
     
  5. marms

    marms Member

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    Well done there.

    It's nice to see someone getting in there and getting their hands dirty.
    You have probably saved yourself a small fortune by doing it yourself and you also have that warm feeling of satisfaction.

    I really hate paying people to do things that I can do myself. With the help of your little write up you may well well have inspired others to 'have a go'.
     
  6. PaulJC84

    PaulJC84 Owner

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    Cheers guys.
     
  7. jcb

    jcb Active Member VCDS Map User

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    and get those stickers off you tyres! like having the price on the bottom of your shoe.... ; )
     
  8. Dan Yeates

    Dan Yeates Audi S4 B5 Avant

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    Hi,

    Do you still have these photos? Is this a difficult/expensive job as I've noticed my S4 has quite a lot of oil around the rear diff. Also, how do you change the oil in the gearbox? Never done it on an S4.

    Thanks,

    Dan
     
  9. PaulJC84

    PaulJC84 Owner

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    Updated the pic links.
     
  10. Dan Yeates

    Dan Yeates Audi S4 B5 Avant

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    Hi, thanks for that.

    Sorry, I'm not familiar with the diff on the car, what have you changed? The seal between the diff and the main drive shaft from the gearbox? Are there boots sealing the diff and the two drive shafts to the wheels?

    Just trying to figure out what I may need to change!

    Is the oil fill easy enough to see once you're underneath? Do I need any particular oil? I read on here that I should use a different oil to the gearbox, without friction additive I think.

    Thanks again for any help.

    Dan
     
  11. aragorn

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    Hes changed one of the seals on the driveshaft stubs, not the main pinion shaft seal.

    Depends where yours is leaking from if it will be the same.
     
  12. Dan Yeates

    Dan Yeates Audi S4 B5 Avant

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    That's what I thought. Thanks.
     
  13. PaulJC84

    PaulJC84 Owner

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    Folks anyone got the part number for the rear diff seal? I am going to replace mine again as the sump is getting damp.

    No drips or anything just better to sort small things before they become big issues.

    Plus where is the best place to get genuine parts now? Need to get a diff seal and a few other bits and bobs.

    Plus anyone any suggestions on what diff oil I should use as I may as well replace that and the gearbox oil while I am in about it.
     
  14. Bradderz_1988

    Bradderz_1988 Dont replace it, Upgrade it !!

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    The diff seal is about a tenner +vat from stealers I've got one ready to fit and any 75w90 oil will do.

    On the subject how much oil does the diff take and also the gearbox as I'm going to get some ordered for when I get round to doing mine ??
     
  15. Bradderz_1988

    Bradderz_1988 Dont replace it, Upgrade it !!

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    Diff seal is 016 409 399 b I asked for n/s but I presume that's same for the offside.
     
  16. NineNails

    NineNails Proud sponsor of the snack food industry

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    A common mistake made with the rear diff is to fill it with oil until it runs out the hole. So with it over-filled it can blow the excess past the seals and then will usually stop leaking The fill level is a few mm below the hole.
     

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