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Whine...

Discussion in 'A4/S4 forum(B5 Chassis)' started by RmcMills, Sep 20, 2009.

  1. RmcMills
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    RmcMills Member

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    [Sep 20, 2009]
    Hello all!
    Just a quick one, on my 2000 s4 there is a quite loud whine in all gears when accelerating or maintaining a constant speed. As soon as you begin to decellerate the noise stops completely. Also the transmission seems to bang when chaging acceleration at low revs at low speeds. Has anyone else experienced this, and can shed any light on the situation?
    Cheers Ollie
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  3. Siena
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    Siena Active Member

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    [Sep 20, 2009]
    Your front differential bearings are shot.

    I had the same with my old 5-speed, mine was just first though, was quiet unloaded, but whined once you stepped on the gas.

    You'll need to replace the front differential bearings, it'll only get worse over time.
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  4. RmcMills
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    RmcMills Member

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    [Sep 20, 2009]
    Ahh that doesnt sound cheap at all!
    Any ideas on cost?
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  5. Siena
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    Siena Active Member

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    [Sep 20, 2009]
    I've just bought a repair kit for a '99 2,8 Quattro, I'll look at the invoice, see how much it all came to.
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  6. Cruz
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    Cruz Member

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    [Sep 20, 2009]
    Yep defo sounds like diff bearings to me.

    Had similar on mine but was lucky enough to get it sorted from the place i bought it from under warranty.

    Certainly not gonna be cheap unfortunately mate.
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  7. s4marsh
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    s4marsh Member

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    [Sep 20, 2009]
    i dont really want an answer to this question if its bad news but when going in reverse you get the usual whine on most cars dont you, whats all that about then????
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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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    [Sep 20, 2009]
    Ours whines on overrun in first, but goes quiet when under load... Whats goin on there then?

    S4Marsh: Reverse gear is "streight cut", rather than helical like the forward gears, and its this that causes the noise. Nothing to worry about. Some race gearboxes have streight cut gears in all gears, if you listen to a GT or touring car you'll hear that noise as they accellerate.

    As for the OP, it might be cheaper to find a low mileage box and swap it out?
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  9. s4marsh
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    s4marsh Member

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    [Sep 20, 2009]
    aragorn your one smart mo fo.. i've heard the term straight cut box in relation to rally/gt cars and such like yes and sort of pretended i understand it but dont really...lol a bit like my g/f then
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  10. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 20, 2009]
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  11. Siena
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    Siena Active Member

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    [Sep 20, 2009]
    Aragorn, RMC's car is an S4, so an 01E 6-speed, not cheap to replace.

    Differential bearings aren't bad to replace, but tranny needs to be pulled, and the case split into torsen, mid section and bellhousing, as the pinion shaft has to be removed to replace the differential bearings.

    On this 2,8 quattro, I'm replacing the pinion bearing too, as a precaution.
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  12. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 20, 2009]
    ah ye, those are expensive.

    I guess its just a case of weighing up the costs of replacement with cost of rebuilding the box in terms of labour and the replacement parts.

    I really hate gearbox internals! They more often than not need dozens of special tools to dismantle them, and tolerances of the parts need set extremely accurately or it all nicely welds itself together in about 5 miles :p
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  13. RmcMills
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    RmcMills Member

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    [Sep 21, 2009]
    Ooh not cool. Looking at a few grand minimum would you say? :(
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  14. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 21, 2009]
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  15. s4marsh
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    s4marsh Member

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    [Sep 21, 2009]
    rmc i hope you find a reasonable outcome to this and cheers aragorn for the gears post..i can stop pretending i know now cos i do.....lol
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  16. Siena
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    Siena Active Member

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    [Sep 21, 2009]
    Hardly. I'd say you're looking at £380 - £550.
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  17. RmcMills
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    RmcMills Member

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    [Sep 21, 2009]
    Ah ok cheers, Thats not too bad then. I'll get it to my mechanic in Northallerton and see what he reckons to it all. Good find there aragorn, you must have sharp eyes!
    I dont seen to be having a lot of luck with this s4, had it 2 weeks and its already needed new brake and clutch master cylinders :/
    #16

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