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  1. #1
    Established Member Two Rings AudiNike12's Avatar
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    Oct 10 2017
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    Car vibrating from 100km/h(60mph) and up

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    I know this can be any number of reasons but do you have any guesses? It's really annoying.
    Audi A6 Allroad 2.7T -04
    Audi A6 2.4 Sedan -04

  2. #2
    Veteran Member Four Rings Audibot's Avatar
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    May 20 2010
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    Wheel balance. If you can get a road force balance, that's best. Check to see if a weight has also come off, or if there is a bend in the wheel.
    2016 A6 TDI Prestige - stock
    2003 allroad 6MT - STUKLR Stage 1, Hotchkis sway bars, RS4 engine mounts, Apikol rear diff mounts

  3. #3
    Established Member Two Rings AudiNike12's Avatar
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    Quote Originally Posted by Audibot View Post
    Wheel balance. If you can get a road force balance, that's best. Check to see if a weight has also come off, or if there is a bend in the wheel.
    Thanks, I'll check this out.

    What about a control arm?
    Audi A6 Allroad 2.7T -04
    Audi A6 2.4 Sedan -04

  4. #4
    Veteran Member Four Rings Audibot's Avatar
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    Easy to check if you have wheel up in the air. If you grab 12 o'clock and 6 o'clock, and shake it up/down, and it moves, then control arms are worn. If you grab 3 and 9, and shake it side to side and it moves, then tie rods are bad.

    But typically wheel balance starts ~100 kph and gets worse for about 30-40 kph and sometimes gets better after but not always.
    2016 A6 TDI Prestige - stock
    2003 allroad 6MT - STUKLR Stage 1, Hotchkis sway bars, RS4 engine mounts, Apikol rear diff mounts

  5. #5
    Established Member Two Rings AudiNike12's Avatar
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    Quote Originally Posted by Audibot View Post
    Easy to check if you have wheel up in the air. If you grab 12 o'clock and 6 o'clock, and shake it up/down, and it moves, then control arms are worn. If you grab 3 and 9, and shake it side to side and it moves, then tie rods are bad.

    But typically wheel balance starts ~100 kph and gets worse for about 30-40 kph and sometimes gets better after but not always.
    Ok thanks. It certainly sounds like a wheel balance issue
    Audi A6 Allroad 2.7T -04
    Audi A6 2.4 Sedan -04

  6. #6
    Veteran Member Four Rings PaperToast's Avatar
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    Apr 29 2009
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    Quadzilla
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    Longmont, CO

    whats the miles, or in your case km's on your car?
    Rockin' the Rockies
    '01 allroad, 240k woot woot, still boosting on original turbos and tippy, slightly more modified. . .

    Scotty@Advanced, "Push it off a cliff, when it hits the ground you should have a few thousand horsepower available for a brief second."

  7. #7
    Established Member Two Rings AudiNike12's Avatar
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    266500km
    Audi A6 Allroad 2.7T -04
    Audi A6 2.4 Sedan -04

  8. #8
    Veteran Member Four Rings PaperToast's Avatar
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    Quote Originally Posted by AudiNike12 View Post
    266500km
    k, wouldnt hurt to check the center drive shaft
    there is a rubber grommet that when it deteriorates enough, it causes vibrations at the speeds your describing and can cause, given enough time, bearing failure in the rear diff and it will leak
    Rockin' the Rockies
    '01 allroad, 240k woot woot, still boosting on original turbos and tippy, slightly more modified. . .

    Scotty@Advanced, "Push it off a cliff, when it hits the ground you should have a few thousand horsepower available for a brief second."

  9. #9
    Established Member Two Rings AudiNike12's Avatar
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    Quote Originally Posted by PaperToast View Post
    k, wouldnt hurt to check the center drive shaft
    there is a rubber grommet that when it deteriorates enough, it causes vibrations at the speeds your describing and can cause, given enough time, bearing failure in the rear diff and it will leak
    How much of a PITA is it to check the drive shaft?
    Audi A6 Allroad 2.7T -04
    Audi A6 2.4 Sedan -04

  10. #10
    Veteran Member Four Rings PaperToast's Avatar
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    Apr 29 2009
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    Quote Originally Posted by AudiNike12 View Post
    How much of a PITA is it to check the drive shaft?
    i had a shop check it, biggest clue was the amount of gear oil leaking out of the flange where the driveshaft bolts too
    but mind you, this had been leaking for several years
    Rockin' the Rockies
    '01 allroad, 240k woot woot, still boosting on original turbos and tippy, slightly more modified. . .

    Scotty@Advanced, "Push it off a cliff, when it hits the ground you should have a few thousand horsepower available for a brief second."

  11. #11
    Veteran Member Four Rings
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    Sep 11 2009
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    I'd inspect control arms and tie rods first. My last shakes were caused by worn out upper control arm. The bushing was torn and loose and it would allow the wheel to wobble/osciallate slightly at greater speeds. The dead give away was the fact that the shaking would change slightly with gentle steering the car left to right (while at higher speeds) to load the arms differently. Shaking purely due to wheel imbalance would not change much in that situation.

    If you're investigating possible drive shaft issue, keep in mind that any drive shaft induced wobble would change, while at the same speed, when alternating drive shaft load by accelerating followed by decelerating only with the engine.



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