Monster MotorsportAH Fabrications
Results 1 to 20 of 20
  1. #1
    1st Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Uxbridge
    Posts
    152

    ***URGENT*** Broken Quattro or bad tyres?

    Hi All,
    A friend of mine has a B6/B7 S4 saloon and has been having trouble with Quattro and his suspension. He's taken it into Audi and they claim it's because his tyre tread is not the same depth front & back? What a load of crap surely?? They have refused to do any work on the car until he buys two new front tyres. There is 1.5mm difference between the two.

    Please help, this is an urgent one.

    Thanks in advance.
    'Daytona B7 RS4 Saloon - with all the trimmings'

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    "Stick a V8 in it!"

    Status
    Online
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,296
    It depends what troubles he's having, but i really cant see 1.5mm affecting a car with a center differential. Old vauxhall turbo 4x4's used to have trouble with different tread depths front to rear, mainly because it had a viscous coupling in the centre instead of a diff, which would overheat. But i really cant see 1.5mm affecting anything...

    I'd be visiting another stealer

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  4. #3
    Moderator

    Status
    Offline
    Join Date
    Jun 2003
    Location
    World of my own
    Posts
    9,813
    I wouldn't use a stealer at all. Why on earth is the guy taking a 4 year old car to a main dealer? Unless they are a very good one (few & far between) I would suggest he takes it to a performance VAG specialist who actually take pride in their work, care about the cars they look after and don't charge 90+ per hour just to change parts (they won't diagnose the problem, just keep replacing things at astronomical prices until it goes away)
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
    Alex Turner

  5. #4
    "Stick a V8 in it!"

    Status
    Online
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,296
    this is true, but some people seem to enjoy taking their cars to main dealers to get ripped off...

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  6. #5
    1st Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Uxbridge
    Posts
    152
    Sorry guys,
    Still under warranty so no costs other than the new tyres. Just seem weird that if your tyres aren't exactly the same tread depth the quottro system and suspension play havoc.
    'Daytona B7 RS4 Saloon - with all the trimmings'

  7. #6
    Moderator

    Status
    Offline
    Join Date
    Jun 2003
    Location
    World of my own
    Posts
    9,813
    Well that's just stealers being stealers I'm afraid. Replace everything that isn't covered under warranty then we'll look at it!
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
    Alex Turner

  8. #7
    "Stick a V8 in it!"

    Status
    Online
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,296
    Well in my opinion that much of a difference should not give you any trouble

    What are the problems you are experiencing?

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  9. #8
    quattrojames's Avatar
    Moderator

    Status
    Offline
    Join Date
    Mar 2008
    Location
    Dorset
    Posts
    13,856

    My Social Networking

    Follow quattrojames On Twitter Add quattrojames on Facebook
    I bought new tyres for the front of mine and kept the rears as they still had over 3mm, so thats a difference of over twice what your mate has and I had no problems at all.
    Ingolstance Read about my A6 HERE.

  10. #9
    J7USS's Avatar
    Shuddup Foooool!!

    Status
    Offline
    Join Date
    Oct 2006
    Location
    LEICESTER
    Posts
    3,671
    Thats got to be one of the worse piles of ****e Ive heard from Audi. I mean come on...1.5mm difference and they are saying thats why his Quatrro system and suspension is playing up.....

    How many of our cars have the EXACT same tread all round to the mm...
    .....anyone!!!

    Your mate needs to get back down there and give them a piece of his mind, was it april fools day or what!!

  11. #10
    bubstar's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Jul 2004
    Location
    Surrey
    Posts
    546
    Quote Originally Posted by shagga View Post
    Hi All,
    A friend of mine has a B6/B7 S4 saloon and has been having trouble with Quattro and his suspension. He's taken it into Audi and they claim it's because his tyre tread is not the same depth front & back? What a load of crap surely?? They have refused to do any work on the car until he buys two new front tyres. There is 1.5mm difference between the two.

    Please help, this is an urgent one.

    Thanks in advance.
    The whole point of Audi fitting a Torsen centre diff' is so the power can be sent front to back or visa versa.

    Take a look here.......





    It's not an WW2 Army lorry!!

    BUB
    A4 Avant S-Line quattro - Avus Silver/Silver Half Leather *240ps*346nm* - a few choice mods. Now Stared up ;-)

  12. #11
    bubstar's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Jul 2004
    Location
    Surrey
    Posts
    546
    I forgot to add, the centre diff' will take up the (slight) difference in tyre diameter
    A4 Avant S-Line quattro - Avus Silver/Silver Half Leather *240ps*346nm* - a few choice mods. Now Stared up ;-)

  13. #12
    evilscotsman's Avatar
    Space Cowboy

    Status
    Offline
    Join Date
    May 2008
    Location
    Fife, Scotland
    Posts
    1,345
    just a thought, I had trouble wi the scooby sliding out and handling ****e when I had some alloys fitted, the young lad given the job at the tyre depot put all the directional tyres on the wrong way, no one noticed till I went back as it had turned into a death trap.

    They switched the wheels round the right way and hey presto, good as new!
    B4 TDI - old skool project / daily driver...if it ain't broke, it's probably an Audi...


  14. #13
    "Stick a V8 in it!"

    Status
    Online
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,296
    Its possible, but the OP still hasn't told us what the problem actually is...

    As its a proper centre differential, and not a viscous coupling, there really should be no problems with tyre size differences like this. Hell you could even fit different sized tyres front and rear and it would still be fine, although its probably not advisable.

    The centre diffs JOB is to take up any differences in rotational speed between the front and rear of the car, when you turn a corner for instance, each wheel on the car ends up turning at a slightly different speed, and the rear axle generally spins slower than the front as the front takes a wider line thru a corner. The diff ensures this can happen with minimal fuss.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  15. #14
    1st Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Uxbridge
    Posts
    152
    Guys,
    Thanks for all the help.
    Just found out from my friend that it is 4mm difference in tread - not 1.5mm.

    Still crap surely?
    'Daytona B7 RS4 Saloon - with all the trimmings'

  16. #15
    g60jet's Avatar
    1st Gear

    Status
    Offline
    Join Date
    May 2008
    Location
    UK
    Posts
    147
    its does say in the my b7 manual that tyre tread depth has to be even across the car, I would be more worried about the fact that he has 1.5mm difference across the car on a quattro to start with.
    |Present: 2005 B7 Audi A4 Avant 2.0T FSI Quattro S-Line|DIS|Phatbox|Aircon'd Glove Box|Ambiant Light Pack|
    |Gf's Motor: 2003 8L Audi A3 18.T Sport | Standard |
    |Previously: SEAT LEON FR TDI|German Spec Corrado G60 JET LHD|Mk2 Golf Cab|Mk2 Fiesta 1.4s|

  17. #16
    1st Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Uxbridge
    Posts
    152
    Sorry,
    As per previous quote his tread depth difference is 4mm between front and rear tyres.
    'Daytona B7 RS4 Saloon - with all the trimmings'

  18. #17
    evilscotsman's Avatar
    Space Cowboy

    Status
    Offline
    Join Date
    May 2008
    Location
    Fife, Scotland
    Posts
    1,345
    what was the original problem though? We cant advise unless we know the details or what was wrong with it in the first place.
    B4 TDI - old skool project / daily driver...if it ain't broke, it's probably an Audi...


  19. #18
    1210tech's Avatar
    Four Ring Fanatic

    Status
    Offline
    Join Date
    Nov 2006
    Location
    Birmingham, UK
    Posts
    689
    mine is a B6 A4 2.5 tdi quattro. i've got two brand new tyres on the rear and two old tyres on the front. the front have got about 2 to 3mm of tread left before they need replacing - i have no problems whatsoever
    A4 2.5 TDi quattro sport saloon
    RNS-E DVD Nav running SW 0600 with 2007 disc including TMC function, Bluetooth Telephone, Audi iPod Interface
    18" RS6's now gone, replaced by OEM 18" S4 alloys
    Retrofit S-Line Bodykit
    Retrofit OEM Xenon's
    Retrofit Front Ambient Lighting
    Retrofit OEM Aero Wipers (thanks PJMSpeedy)

  20. #19
    1st Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Uxbridge
    Posts
    152
    This is what he just told me:
    Apparently they're changing the entire quattro / transmission system for me... I'm not entirely sure what is exactly wrong, but when manoeuvring at slow speed using the steering the car jumps rather than moving. Its really weird. Apparently it is a common fault on the Q7...
    'Daytona B7 RS4 Saloon - with all the trimmings'

  21. #20
    flat stick in top (usually)

    Status
    Offline
    Join Date
    Oct 2008
    Location
    In a world of pain
    Posts
    12
    sounds like one of the diffs is locked.

    when we build stocks, we weld up the rear diff to "lock it" as limited slips arent allowed, this makes high speed cornering better as drive is equal on both wheels giving the ability to throttle steer, however at slow speed it just pushes and bounces the front as the resistance to turn is huge from the rear

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO