Rear Wiggle/Shimmy!! - Eibach Pro

[AJ Jacob]

Hi Guys,

For the life of me I cannot figure out what causing this weird effect. Hope someone here can shed some light on the matter.

I recently upgrade to the Eibach Pro kits and had a full 4 wheel alignment done along with re-calibration of the adaptive suspension.

The issue I am getting is when I hit a pothole, manhole cover or uneven surface, the cars rear end will wiggle almost like a side step at the rear. To make sure i want going mad, I had another person witness this to make sure it wasn't just me. At high speeds when you hit manholes covers on the road it is unnerving. I have taken it back into the guys who have aligned it and they say everything is spot on.

Anyone know what might be causing it?

 

[Leevr]

I get the same effect on standard set up with mag ride. Be interesting to find out if it's a common issue or a trait of the rear end. Never really concerned me as it's only a momentary side twitch.

 

[Lehn]

I get the same effect on standard set up with mag ride. Be interesting to find out if it's a common issue or a trait of the rear end. Never really concerned me as it's only a momentary side twitch.

Same here, also on stock magride setup. But I would have expected a set of Eibach Pro-Kit to solve this issue...

 

[AJ Jacob]

Never had the issue on my Stock Setup

 

[Martinbanshee]

I’ve had this since new with my S3 Saloon with MagRide, surprised you’re still getting it with your new setup.

 

[Orange225]

Are your tyres running a bit low on tread, mine got wiggly towards the end of the rear tyres life, put my winter set on with new tyres and the wiggle seems to have all but disappeared.

 

[AJ Jacob]

Are your tyres running a bit low on tread, mine got wiggly towards the end of the rear tyres life, put my winter set on with new tyres and the wiggle seems to have all but disappeared.

Interesting, my tyres are probably half way through the treads, I am looking at getting it changed to winters soon.
However this issue has only started after I fitted the Eibach springs, so surely the treads couldn't have changed within a week?

 

[RJ-8V]

I had the same problem with the standard sport suspension. Ive fitted the Eibach Pro and it got less. I still need to realign everything but will change to winter tyres soon.

A3 8V Facelift Limousine

 

[Orange225]

Tyres could be just one of the issues, mines a Quattro, so that adds yer another variable, my last a3 did the same till I changed the shocks

 

[AJ Jacob]

Tyres could be just one of the issues, mines a Quattro, so that adds yer another variable, my last a3 did the same till I changed the shocks

.

That is a fair point, however its trying get a rough idea of what could be causing this. I am really surprised people have had it from new and not had it investigated...it does feel extremely unnerving for me.

 

[-Ju-]

I've had H&R's, Eibach Pro's and now the MSS kit on my magride sportback S3 and tbh have never had any of the issues that you seem to be experiencing. I get the bang from the rear top mounts but that's a well documented issue on the PFL

 

[DJAlix]

I was the "witness" to Mr AJ's Saloon "*** Shaking", was a very strange sensation indeed! I have test driven A LOT of 8V's with almost every suspension setup one can think of and I have never experienced this before, for sure I did / do not get it on my own A3 while on stock or now my MSS springs. Not sure how to explain it to be honest.

 

[AJ Jacob]

I've had H&R's, Eibach Pro's and now the MSS kit on my magride sportback S3 and tbh have never had any of the issues that you seem to be experiencing. I get the bang from the rear top mounts but that's a well documented issue on the PFL

I think initially didn’t notice it, but after a day or two I could really notice it.

I can’t seem to figure out what causing it.

 

[AJ Jacob]

I was the "witness" to Mr AJ's Saloon "*** Shaking", was a very strange sensation indeed! I have test driven A LOT of 8V's with almost every suspension setup one can think of and I have never experienced this before, for sure I did / do not get it on my own A3 while on stock or now my MSS springs. Not sure how to explain it to be honest.

Agreed, made me feel sane to get another person to experience it. Thought it was all in my head!

 

[airbus319]

Have you checked your rear tyre pressures?

Also worth checking your ARB and drop links as they will have been disconnected to fit the new springs


Sent from my iPhone using Tapatalk

 

[Mark_86]

I get this sometimes, usually when changing lanes on the motorway. I'm stock Mag-ride.

I've narrowed it down to tyres... it seems to be a mix of pressures and wear on the front vs rear axle. No doubt Quattro doesn't help matters but when I adjust the tyre pressures, it seems to cure it for a few months.

 

[Orange225]

Motorways are where I noticed it at its worst, don’t think it’s a new a3 issue, mines a facelift 8p

 

[AJ Jacob]

I get this sometimes, usually when changing lanes on the motorway. I'm stock Mag-ride.

I've narrowed it down to tyres... it seems to be a mix of pressures and wear on the front vs rear axle. No doubt Quattro doesn't help matters but when I adjust the tyre pressures, it seems to cure it for a few months.

Ok, I’ll check my pressures tomorrow and see what’s the crack with that. The place that did my alignment did change the tyre pressures, which to be fair I haven’t checked

 

[sparkymark75]

Ok, I’ll check my pressures tomorrow and see what’s the crack with that. The place that did my alignment did change the tyre pressures, which to be fair I haven’t checked

Tyre places, from my experience, tend to err on making your tyres rock hard. My newly fitted tyres were up about 40/41. I had to let some air out of them!

 

[AJ Jacob]

Ok, So checked my tyre pressures and they were reduced massively to around 30 / 32 psi on front and back by the alignment place. . Anyways sorted the pressure out and now the effect seems to have reduced a bit but it is still there.

So i am assuming this is not fully to do with tyres pressures alone.

 

[Mark_86]

Ok, So checked my tyre pressures and they were reduced massively to around 30 / 32 psi on front and back by the alignment place. . Anyways sorted the pressure out and now the effect seems to have reduced a bit but it is still there.

So i am assuming this is not fully to do with tyres pressures alone.

I found the tyre wear on the different axles also had an effect... i think it's just a trait of the car tbh