Go Back   AudiWorld Forums > Audi Models > Audi allroad
Sign in using an external account
Register Forgot Password?


Audi allroad Discussion forum for the original Audi allroad

Welcome to AudiWorld Forums!
Welcome to AudiWorld.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the AudiWorld Forums community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 09-21-2011, 06:49 AM   #1
Audiworld Junior Member
Account #: 162857
 
Join Date: May 2009
Location: Dillon, CO
Posts: 32
Default Vibration Under Load

I have run into a somewhat peculiar condition with my 2001 Allroad and thought I'd see if anyone else had some related experience. This summer my car has developed a subtle but quite noticeable vibration that seems to be engine RPM dependent and becomes most evident above 3000 RPM when under load (accelerating or climbing steadily up a steep grade). The vibration is seems to be coming from the front and is perceptible through the feet (pedals/floor boards) and hands (steering wheel). I'm suspecting that it may have something to do with either the engine mounts or possibly a bad front axle. The car has ~130k on it.

It is definitely not tire balance or alignment related.

Any ideas?

Thanks,
Don
__________________
Don
Audi 2001 S4
dsorensn is offline   Reply With Quote
Old 09-21-2011, 12:56 PM   #2
AudiWorld Super User
Account #: 54409
 
Join Date: Apr 2003
Location: Full-time Coloradoan now
Posts: 3,553
Default

On my 6mt allroad, that vibration got more and more pronounced. It went away with replacement front axles from Raxles. The old axles produced no clicking sounds typical of bad joints and showed no torn boots or other indications of failure.
Kneale Brownson is offline   Reply With Quote
Old 09-21-2011, 01:40 PM   #3
Audiworld Junior Member
Account #: 220539
 
Join Date: Aug 2011
Location: Ontario, Canada
Posts: 36
Default

Vibration while accelerating is a common symptom of a cv joint failing. Check the boots for anything obvious, but they can fail without visible wear, as Kneale notes. Another vote for Raxles.
__________________
Randall
2001 Golf, 5spd 1.9L TDI, 400K km commuter. Ventectomy, Evo plate, Bilstein TCs, TT LCA bushings.
2001 allroad, 6spd 2.7T, 185K km fun & family. Custom hitch, APR 4-prg, Clunky Bilsteins, Raxles, Arnott gen 1 bags.
rhskcdn is offline   Reply With Quote
Old 09-21-2011, 06:45 PM   #4
Audiworld Junior Member
Account #: 162857
 
Join Date: May 2009
Location: Dillon, CO
Posts: 32
Default

Thanks much for the feedback! I kinda figured that the axles were the most likely cause. Is there convenient way to inspect the CV joints prior to ordering replacements to confirm the condition?

Don
__________________
Don
Audi 2001 S4
dsorensn is offline   Reply With Quote
Old 09-21-2011, 07:33 PM   #5
Audiworld Junior Member
Account #: 220539
 
Join Date: Aug 2011
Location: Ontario, Canada
Posts: 36
Default

Quote:
Originally Posted by dsorensn View Post
Thanks much for the feedback! I kinda figured that the axles were the most likely cause. Is there convenient way to inspect the CV joints prior to ordering replacements to confirm the condition?

Don
Not that I know of. If the boots are torn and you have the characteristic grease spray then you can be assured the CV joint is done. With everything else, it is often just a vibration, clunking, and feeling. That isn't to say it is the only possibility, but motor/transmission mounts don't tend to be RPM or load dependent (worn mounts often vibrate with no/little load in my experience). There are other drive line joints/bushings it could be but axles are more common. If you've check the tires/wheels and done the usual front-end checks, then it is probably one of the CV joints. If there is a reputable indy shop in your area, you could bring them some coffee and ask if they would mind taking it out for a spin and offering their opinion.
__________________
Randall
2001 Golf, 5spd 1.9L TDI, 400K km commuter. Ventectomy, Evo plate, Bilstein TCs, TT LCA bushings.
2001 allroad, 6spd 2.7T, 185K km fun & family. Custom hitch, APR 4-prg, Clunky Bilsteins, Raxles, Arnott gen 1 bags.
rhskcdn is offline   Reply With Quote
Old 09-21-2011, 07:37 PM   #6
AudiWorld Member
Account #: 184648
 
Join Date: May 2010
Location: Vancouver BC Canada
Posts: 168
Default

I concur on the CV axle diagnosis. Mine did the same thing.

On my 2002 TIP, I could grab the CV and if I really jerked on it you could feel some up/down movement in the joint. That was enough to cause the wheel to vibrate and shudder under moderate load. In my case, hard acceleration masked the problem.
Kristopher is offline   Reply With Quote
Old 09-22-2011, 05:30 PM   #7
AudiWorld Senior Member
Account #: 80348
 
Join Date: Aug 2004
Posts: 1,126
Default

Could be the driveshaft support
__________________
2004 4.2 Full paint/Armorcoat/Tinted windows/Mud Flaps/Trailer Hitch/H-Sports/205K
MYD-WGN is offline   Reply With Quote
Old 10-23-2011, 07:10 PM   #8
Audiworld Junior Member
Account #: 162857
 
Join Date: May 2009
Location: Dillon, CO
Posts: 32
Default

As a follow-up to this thread I did replace both front drive shafts with units from Raxles and the problem was resolved. The front left inner CV joint was in the worst shape, once off of the car it would simply rattle as you moved the CV joint around by hand. We have driven the car a couple of thousand miles and no vibration.

So on to the next problem.... :-)

Don
__________________
Don
Audi 2001 S4
dsorensn is offline   Reply With Quote
Old 10-23-2011, 09:51 PM   #9
AudiWorld Member
Account #: 184648
 
Join Date: May 2010
Location: Vancouver BC Canada
Posts: 168
Default

Thanks for updating, Don.

As mentioned I replaced mine, but only the LF and it was also the inner that was shot. Now it seems I should have just replaced both since I'll be taking it for another wheel alignment because the RF is now acting up.
Kristopher is offline   Reply With Quote
Old 11-05-2011, 10:02 AM   #10
AudiWorld Newcomer
Account #: 225352
 
Join Date: Nov 2011
Posts: 1
Default

i to am getting this from my audi A4 it only happens when at arount 2500 rpm and comes up from the stick the car is 2002 with 139k miles on it
delboydub is offline   Reply With Quote
Old 11-05-2011, 10:02 AM
AudiWorld
Audi R8




Paid Advertisement
 
 
 
Reply

Tags
2004, 3000, 70, a4, a8l, accelerating, allroad, audi, b7, c4, floor, load, mph, rpms, tt, vibration


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 12:01 AM.


Copyright 2014 AudiWorld.com Audi Enthusiast Community