Urs6 Avant weird steering wheel motion while going through speed bumps

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  • loxs
    S2Forum Hobbyist
    • Aug 2014
    • 17
    • Country: Bulgaria

    #1

    Urs6 Avant weird steering wheel motion while going through speed bumps

    I own the car for more than a year and it has always been like this, but it's now starting to work on my nerves and I wonder if I can do anything to prevent it.

    During this time I have changed most of the suspension: Koni sport shocks and all kinds of bushings. Everything that my mechanics advised for. Currently they say that "there is nothing that needs changing". I'm thinking about changing the springs with more stiff ones as well (currently I have the original ones I guess), but I have no idea if this is going to better the situation.

    The car is stable while cornering... at least with the speeds I dare to corner

    But the problem is when going over bumps. And especially over steeper speed-bumps.

    I am not sure I can describe it very well but I'll try:

    Variant A:
    1. one front wheel hits the bump and my steering wheel does (or tries to do) several jerky motions.
    2. the other wheel hits the bump and again, the same happens.

    Variant B:
    Both wheels hit the bump at (almost) the same time. It feels like both wheels get displaced backwards. The steering wheel becomes "softer" then "stiffer" several times before the car finally gets stabilized on top of the speed bump

    I have servotronic fitted from another car but this problem was present before we installed it.

    I have talked to other people driving C4 cars and they say that "these cars drive like that".
    Still, I decided to ask you, as it really annoys me and it would be great if I can do something to fix it.
    Last edited by loxs; 23 September 2015, 08:11.
  • Thuppu
    S2Forum Freak
    • Sep 2010
    • 4115
    • Country: Finland

    #2
    You told bushes have been changed. Also the subframe bushes? https://www.youtube.com/watch?v=wTSOA8a4TkQx

    PS. Solid subframe bushes eliminates all play between chassis and subframe.

    Audi UrS4 Avant 2.5 20vt - twincharged - Project
    Audi 80q B4 Sedan 2.2 20vt - Daily user
    BMW 320d Touring e91 M-Sport - Daily user
    BMW 740iA e38 - Project

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    • loxs
      S2Forum Hobbyist
      • Aug 2014
      • 17
      • Country: Bulgaria

      #3
      Hm, I'll go have this checked.
      Does anyone know where I can buy these for less than 200 euro a peace?

      Comment

      • ADP
        S2Forum Addict
        • Mar 2011
        • 200
        • Home: Bulgaria

        #4
        Yes Loxs,solid bushing eliminates all negative aspects,but they have allso negative:More vibration in the body,but not so dramatic!:0Try and stick with them!This was the best upgrade for my car which i ever make it!

        Comment

        • loxs
          S2Forum Hobbyist
          • Aug 2014
          • 17
          • Country: Bulgaria

          #5
          Hi ADP, could you give me more info on where to buy them?

          Comment

          • Thuppu
            S2Forum Freak
            • Sep 2010
            • 4115
            • Country: Finland

            #6


            For front: http://www.s2forum.com/forum/showthread.php?t=60977

            For rear: http://www.s2forum.com/forum/showthread.php?t=77089

            Audi UrS4 Avant 2.5 20vt - twincharged - Project
            Audi 80q B4 Sedan 2.2 20vt - Daily user
            BMW 320d Touring e91 M-Sport - Daily user
            BMW 740iA e38 - Project

            Comment

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