AH FabricationsSky Insurance
Results 1 to 17 of 17
  1. #1
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614

    Strange Vibration Problem in One Wheel

    I've a strange vibration problem that only happens in one wheel. Wondering if anyone has come across anything similar or has any ideas of what may be causing it?

    The problem happens when travelling in 6th at 65mph and I let my foot off the accelerator. The front passenger wheel shudders until I get to 55mph. Once I reach 55mph the shuddering stops.

    If I put my foot all the way down on the clutch pedal when the wheel is shuddering, the shuddering stops also.

    The following have been checked:

    1) Wheels are balanced and aligned correctly.
    2) Wheel is not buckled.
    3) All bushings are fine.
    4) Majority of suspension components have been replaced (drop links, complete tie rods, wishbone bushes, springs, dampers).
    5) The wheel bearing has been replaced about a year ago.

    Any ideas?

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,055
    Have you tried swapping wheels about and see if it follows?

  4. #3
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,016
    Could be bush related... check the wishbone rear bush... these are voided type bushes and when they go they tend to make the whole suspension wobbly... you may also find it pulling to the left under braking...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  5. #4
    Buzzer's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Apr 2011
    Location
    Dublin
    Posts
    410
    could this be anything to do with the flywheel, especially when it goes when the clutch pedal is pressed?

  6. #5
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Good idea about swapping wheels! Will give this a try.

    Wishbone bushes were just recently replaced. Rear ones are the solid TT type and have no cracks. So don't think it's that.

    If the problem was flywheel related would it cause vibration in only one wheel?

  7. #6
    A3Tom's Avatar
    Smell my finger.

    Status
    Offline
    Join Date
    Mar 2009
    Location
    Solihull
    Posts
    3,509
    Wheel balance weight come off? I know you said they are but have you had them actually checked since the wobble started?

    I've just dont the front left balljoint on mine, that cured the banging but also a slight wobble... although it was at all speeds.

    It sounds very much like something is out of balance at whatever RPM 65mph in 6th is!.
    2000 Audi A3 1.8T Sport - Custom Code Phase 1 remap / Custom Stainless Catback Exhuast / MKII 18" RS4 Reps / Wietec Ultra GT40mm / KW ARB's / Forge TIP / Forge 007 / Green Panel Filter / EBC Greenstuff pads / 312mm S3 front brake upgrade / Aero Wipers / LED Interior Lights / LED Side Repeaters / Face Lift Rear Lights and covered in Dodo Juice

  8. #7
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Ball joints were replaced too - it's almost a brand new S3 at this stage :-)

    This problem existed a few months ago. Balance and tracking were checked. It didn't cure it. The problem has gotten worse now. Worse in the sense that the shuddering is harder. It still happens at the same speeds.

    I guess if I swap wheels that would rule out a balancing problem.

  9. #8
    A3Tom's Avatar
    Smell my finger.

    Status
    Offline
    Join Date
    Mar 2009
    Location
    Solihull
    Posts
    3,509
    Propshaft?
    2000 Audi A3 1.8T Sport - Custom Code Phase 1 remap / Custom Stainless Catback Exhuast / MKII 18" RS4 Reps / Wietec Ultra GT40mm / KW ARB's / Forge TIP / Forge 007 / Green Panel Filter / EBC Greenstuff pads / 312mm S3 front brake upgrade / Aero Wipers / LED Interior Lights / LED Side Repeaters / Face Lift Rear Lights and covered in Dodo Juice

  10. #9
    s3schofield's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Sep 2009
    Location
    Burnley Lancs
    Posts
    129
    put the spare on see if that makes a difference , and prop shaft is a good call they are balanced from the factory with weights could have fallen off
    Audi S3 8L 2001 imola yellow autobahn tip, heatshield, metal mesh cone filter, apr r1 DV, REVO stage1, SPS box, Weitec coilovers, forge short shift kit, bosch aero wipers, 20mm rear spacers Wanted 3"Dp Decat rear arms pm me

    my progress thread http://www.audi-sport.net/vb/a3-s3-f...ss-thread.html

  11. #10
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Prop shaft. That's the same as the drive shaft right?

    Looking at the diagram on VAGCAT http://www.vagcat.com/epc/cat/au/A3/...01/52/2401704/ it seems to be just two CV joints and a metal bar, this correct? So the only options are to replace CV Joints (or entire drive shaft)?

    What do you mean when you say the prop shaft is balanced from the factory. Are individual weights put on it (like a wheel) in order to balance it? How does it become inbalanced? How would you test whether it is balanced and re-balance it?

  12. #11
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,016
    Never personally known a driveshaft to go out of balance... typical causes are dropped wheel weight, track rod, track rod end, lower ball joint, wishbone front voided type bush, wishbone rear bush... any of these are more likely to be the cause of your issue than the driveshaft tbh...

    On rare occasions I have seen aftermarket wheels cause issues where the centres are too large and they don't sit on square... I have also seen some wheel spacers give problems not sitting square from corrosion etc..

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  13. #12
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Quote Originally Posted by <tuffty/> View Post
    Never personally known a driveshaft to go out of balance... typical causes are dropped wheel weight, track rod, track rod end, lower ball joint, wishbone front voided type bush, wishbone rear bush... any of these are more likely to be the cause of your issue than the driveshaft tbh...
    Any time I've had an unbalanced wheel before it would shudder when reaching a certain speed and continue to shudder if the speed increased.

    This seems quite different in the I don't get any shuddering until I take my foot off the gas at 65mph. It doesn't happen if I take my foot off the gas at 70, 75, 80 etc. But when decelerating from 80mph say, once I hit 65mph the shuddering will happen and stay until I get to 55mph.

    All the components you mention here have been replaced within the last year or two. All seem solid. There is a fraction more play from the prop shaf on the problem side, compared to the prop shaft on the other side.

    Quote Originally Posted by <tuffty/> View Post
    On rare occasions I have seen aftermarket wheels cause issues where the centres are too large and they don't sit on square... I have also seen some wheel spacers give problems not sitting square from corrosion etc..

    <tuffty/>
    Original 17inch wheels. But I do have spacers. Possibily a cause?

  14. #13
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Swapped the front wheels from left to right and the vibration problem is still there on the passenger side. So obviously not a balancing issue.

    * Track rod, track rod end - replaced entire part about a year ago, no play in these.
    * Lower ball joint - replaced a few months ago, fine too.
    * Wishbone front voided type bush, wishbone rear bush - replaced a few months ago, all look fine.

    So what does that leave? Just the prop shaft\CV joints?
    Last edited by metricspaces; 16th October 2011 at 21:25.

  15. #14
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,055
    can you try it without the spacers?

  16. #15
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    Yeah, I was actually thinking of removing the spacers on the front to test that.

    Am I right in thinking that the spacer is just a plate that is only held on by the wheel nuts? Interestingly enough, when I took off the problem wheel, the spacer seemed a lot looser than the other side.

    I see this guy here had a similar problem with spacers on standard wheels. I'm on standard wheels too. Wheel spacers and vibration

  17. #16
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,055
    non hubcentric spacers are known to be troublesome

  18. #17
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2007
    Posts
    614
    I've got H&R spaces (10mm front, 20mm rear). I'm pretty sure that they are hubcentric.

    The problem described in the link I posted sounds exactly like the problem I am experiencing - vibration in some 10/15mph range. So definitely worth taking them off and seeing what happens.

 

 

Similar Threads

  1. Strange vibration under full throttle acceleration. Any ideas?
    By Prawn in forum A3/S3 Forum (8L Chassis)
    Replies: 13
    Last Post: 29th July 2011, 15:21
  2. Strange shaking/vibration/juddering from front wheel/s
    By Dazmo in forum Audi S4/A4/A4 Cab (B7 Chassis)
    Replies: 25
    Last Post: 8th March 2010, 22:47
  3. Strange engine vibration....
    By rusty1 in forum A3/S3 Forum (8L Chassis)
    Replies: 13
    Last Post: 18th July 2009, 17:50
  4. steering wheel vibration
    By jase0851 in forum A4/A4 cabriolet/S4 forum(B6 chassis)
    Replies: 4
    Last Post: 17th August 2007, 13:09
  5. Wheel Vibration... But Balanced??
    By ZeroK66 in forum A4/S4 forum(B5 Chassis)
    Replies: 3
    Last Post: 29th August 2006, 18:46

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

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

Content Relevant URLs by vBSEO