wierd juddering when on full lock

[A4B6Cab]

A4 cab 3.0 sport (03 plate) on full lock, when driving slowly like in a car park or something, theres a wierd juddering noise and a judder of steering wheel, almost as tho your driving on a flat tyre, not a metal on metal sound, but the feeling of a flat (checked all 4 tyres pressures all fine), theres also a squeal on ful llock, been told this is probably power steering pump and its not uncommon, any idea about the judder?

thanks in advance

[fourringsrus]

Hi Glen, assuming you are quattro with that 3.0 it is quite normal to get a dull rumbling feeling on full lock at low speeds ie; car parks, pulling out of junctions etc.
You wouldn't be wasting your time inspecting bush's ,roll bars/link arms c/v joints and joints etc as a matter of course and even 4 wheel tracking.
If all the above checks appear to be sound dont worry,my 3.0 quattro did this and countless other quattro drivers will tell you similar stories,as this topic has been covered many times
Good luck
Stuart

[nmahi]

try the ball joints for movement.

[rhencullen1989]

My 1.8T quattro s-line 190 also does this, i have come to the conclusion its related to wide tyres and full lock, the tyres skip across the road, it seems worse when it's cold and the rubber is harder, take it slower on tight turns and it's a lot better. In my opinion nothing to worry about, by the way, just had a 4 wheel alignment at audi and no different.

[Dave Avant]

It's not just Quattro that do it!!

It's just Audi's over complicated front suspension!!! Mine bugs me a little and eats tyres!!

I think Audi's should come with quattro as standard as the grip on FWD is a bit cack. I get wheelspin in 3rd gear on the motorway, before the snow!! :D OK yes mine is a remapped diesel! ;)

[toff3ltr]

Same here but my 3.0 quattro has never had this juddering problem before, im going to top up the power steering fluid on Monday as its on min and if that dont help then it off to Audi :( has to be something wrong somewhere.

[pebblypuss]

My 2.5 TDi Cab is doing this. It feels worse in the winter with reduced grip, especially in wet or frosty car parks. My front tyres had worn the inner and outer edges so got a basic wheel alignment check that confirmed the toe-in was OK, but as we all know, these are much more complicated than that. I booked it in for a 4-wheel alignment at Audi dealer and they took a look and said it wasn't needed and just blamed the tyre wear on under inflated tyres and going round roundabouts too fast.
I have Michelin PS2s on it and they do look a little flat when stationary yet they're at the correct pressures as stated in the car + a couple of PSI. I'm wondering if it is worth putting a fair bit more air in them.

Mark.

[fourringsrus]

[QUOTE=toff3ltr;456510]Same here but my 3.0 quattro has never had this juddering problem before, im going to top up the power steering fluid on Monday as its on min and if that dont help then it off to Audi :( has to be something wrong somewhere.[/QUOT

HEY BUDDY, REMEMBER TO CHECK IF ITS ATF OR MINERAL OIL BEFORE YOU TOP UP

[scooby_d0o]

The juddering is nothing to be worried about. it may be more apparent in the wintry weather due to less grip, but mine is like this when its wet or wintery. Reason for this is there is a 40:60 power split biased towards the rear, ie the rear wheels push more than the front. when you put a full lock on the rear wheels are trying to drive the car straight forward while the fronts are trying to pull and turn the corner, the result is the front wheels skip slightly until some of the lock is reduced.
Most permanent 4wheel drive cars suffer from this.

[vwlt]

Depends on the judder, if it is not the 'normal' judder you get with the quattro, it may be the issue I had which was the power steering pump tensioner which was at fault, which was causing judder at the steering wheel and quite noisey.

It got replaced and all was fine again.

Hope this helps, just my experience.

[scooby_d0o]

Depends on the judder, if it is not the 'normal' judder you get with the quattro, it may be the issue I had which was the power steering pump tensioner which was at fault, which was causing judder at the steering wheel and quite noisey.

It got replaced and all was fine again.

Hope this helps, just my experience.

you could test this by putting a full lock on side to side while stationary, the judder would be there without movement if it was pump related.

[toff3ltr]

[QUOTE=toff3ltr;456510]Same here but my 3.0 quattro has never had this juddering problem before, im going to top up the power steering fluid on Monday as its on min and if that dont help then it off to Audi :( has to be something wrong somewhere.[/QUOT

HEY BUDDY, REMEMBER TO CHECK IF ITS ATF OR MINERAL OIL BEFORE YOU TOP UP


Thanks:D

Mineral in mine and a lot cheaper from Audi than Halfords!

Well the pump seems to be a lot quieter, juddering is still there but not as bad:confused: Think im going to live with it for now.

[toff3ltr]

OK, just collected car from garage and after handing over £43.63:mad: was told the fault is........

Wrong size tyres fitted, balding on edge and over inflated.

[scooby_d0o]

OK, just collected car from garage and after handing over £43.63:mad: was told the fault is........

Wrong size tyres fitted, balding on edge and over inflated.

money well spent lol. well mine judders and deffo does not have incorrect tyre sizes, pressures are correct and all tyres are new. Also just been in for full wheel alignment check today (nothing to do with juddering, just not had one in 18months) Ball joints checked at same time and car was all good, only slight adjustment needed

[toff3ltr]

money well spent lol. well mine judders and deffo does not have incorrect tyre sizes, pressures are correct and all tyres are new. Also just been in for full wheel alignment check today (nothing to do with juddering, just not had one in 18months) Ball joints checked at same time and car was all good, only slight adjustment needed


TBH they couldn't find a fault on mine either althought i do have 225/55/16 fitted and not 215/55/16.

Dont know what to do next :confused:

[pebblypuss]

I'm curious, having read other threads about summer/winter tyres, could this simply be summer compound tyres getting too hard in the low temperatures we've had recently? I hadn't noticed mine was that bad until late Autumn.

Mark.

[toff3ltr]

I'm curious, having read other threads about summer/winter tyres, could this simply be summer compound tyres getting too hard in the low temperatures we've had recently? I hadn't noticed mine was that bad until late Autumn.

Mark.


Mark, Think you've Hit the nail on the head!

Mine was fine till late autumn and now its at its worse, my mechanic spent 45min checking everything today and could only come up with wrong size tyres which have been on the car for 18 months with no issues.

[toff3ltr]

Sorted! my tyre tread depth is low, put me mates wheels with newish tyres on and the juddering stoped!

[pebblypuss]

I've a loaner B8 A4 from my dealer while they're fixing my glowplugs and the scrubbing appears on that too, I'm putting it down to wide low profile tyres, full lock and cold rubber.

Mark.

[RickT]

My A4 did this (Running 235/45/17) when the tread was less than 3mm, it just skipped along in full lock when wet..

Now i have put some new rubber on the front, its perfect again..

Rick

[A4B6Cab]

Cheers everyone, forgot to say mines a 2WD tho :o

tyre wear on outside of tyre is really bad on fronts, so need to shop around for new tyres anyway, its got 18's on so no doubt going to cost an arm and leg at least....

Someone mentioned checking ball joints, whats the best way to do this?

[qa15ar]

same probelem as everyone, was running on michelins PS2's changed to bridgestones problem gone, defo down to tyres