Wheel Judder

[Mirez]

Guys and Gals (Boom Boom), I've got a slight wobble going on around 50mph right up to about 70 which is present with or without engine power (ie coasting), I assumed wheels but I've just changed them for 18" RS6 all new and fully ballanced and, whilst better, its still there... I've got drop links and track rod ends coming just in case and because I like to change things like that but any other issues known about? I've been reading the threads about brake discs warping but this is when driving normally, not when braking - my thoughts are if its warped then it could still be coming into contact when not applied?

 

I've also been reading a TSB about shuddering (Galaxy 2001-096 (06-12-2001)) which talks specifically about shuddering at these speeds and re-aligning the subframe. Well I want to have it tracked following the new wheels so I might try this first as the procedure seems reasonably strait forward - just wondered if anyone else has had this kind of issue?

[mikej]

Had similar issue with mine turned out to be a track rod end , looked fine on the car but like you i changed drop links = same and track rod ends = result

how about posting a pic of your motor with the rs6 rims on it , how does it drive and did you lower it at the same time ?

Edited May 29, 2008 by mikej

[mikeohope]

Make sure the wheels are balanced inside and out. Very important. When mine were balanced on the outside only I had judder but as soon as I got the insides balanced as well it was solved.

[Mirez]

I shall post pictures shortly :ph34r:

 

They are deffinately balanced inside and out, they've used the stick on weights (at my request!) and the company I got them from has some great reviews but thanks for the suggestion.

 

Hopefully the trackrod ends and drop links will arrive tomorrow and I think I'll do the TSB anyway since I'll need it tracked after the rod ends are changed... has anyone else carried out that TSB?

[chromedome]

Dry CV joints? Wobble can be caused by this (do a search). Check that there is enough grease in the joints.

[Mirez]

Thanks for the suggestion, I did look at the search results and they all seem to be effecting acceleration - my wobble is with or without engine assistance, with or without clutch which is why I didn't suspect any of the drive train, surely dry CV joints would be felt across the range and be more prominent of acceleration?

[mikeohope]

Just a point, I had to have mine done with clip on weights on the outside as well a sstick on weights on the inside. The fitter who did it told me that the stick on ones don't always get it spot on and the Galaxy is a bit subject to whhel wobble. Make sure the track is right as well. Its amazing how easily it goes out of plumb.

[Mirez]

Thanks for that, I think the tracking is out slightly but would that cause wheel wobble?

 

I did the drop links and the TSB info tonight and the issue is better but still there, the drop links were completely shot - I'm amazed they wern't making any noise! I'll fit the track rod ends tomorrow and then have it tracked, I'll ask them to check the new wheels whilst they are at it but fter that I'll be scratching my head a little more...

 

Just for clarification,

 

it does it at 50mph+

on old wheels and with new wheels

there is no knocking, noise on take up

drive shafts and barings all seem fine with no play

there is no noise if pushed hard in either direction with or without acceleration

if its pulling HARD then the vibration is only just there, its when its cruising that its most obvious

its not the subframe TSB :angry:

CV joints all look fine, boots are sealed and in good condition.

 

Regarding the grease, how do I tell how much is in there? How do I tell if it needs greasing (other then this vibration lol)

[Mirez]

Anyone able to offer any further advice? I think I may reluctantly take this to ford tomorrow - at least my local dealer is one of the good few!

[Mirez]

Just a follow up really as I hate threads that just twindle away without a resolution. I replaced the lower arms and lower ball joints today as a final effort before sending to Ford. Parts from a Motor Factors (Kevin Cooper - Plymouth) came to