Suspension Shudder

Springs, shock absorbers, swaybars,
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Suspension Shudder

Postby specwarop » Wed Sep 10, 2014 9:04 pm

Hey Guys,

Need some help with my 2006 Liberty 3.0R Manual.

I recently replaced the following on the front suspension
    Outer Tie Rods,
    Lower Ball Joint,
    CVs,
    Sway Bar End Links,
    Brake Rotors and Pads, and
    Wheel Bearing Hubs.

All things went in fine, had the wheel alignment afterwards. But on two occasions over the past 2 weeks (possibly 700km), randomly when going 100kmh, I have noticed a steering shudder or wobble, which scared the bugger out of me.
Now what do you guys think this could be? Prior to the parts installation, there were no issues like this, no shudder whatsoever. (I replaced the parts because they appeared worn, CV was leaking)...
So something related to my work or the parts, is causing this issue. Having a look again at everything, nothing is obviously wrong. The wheels dont move when I test the ball joint or tie rods. Bolts all tight.

What the hell is going on?
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Re: Suspension Shudder

Postby jslayz » Wed Sep 10, 2014 9:13 pm

Hows your LCA bushings...?
CURRENT - ATP GTX 3576 - 22psi - 283.7awkw
OLD - Dom 1.5Xtr - Last dyno 254ahkw, previous 238ahkw, first 224awkw.
My journey thread: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523
My Lib Pics here: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523&start=570#p370656
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Re: Suspension Shudder

Postby specwarop » Wed Sep 10, 2014 9:16 pm

When I bought the car about 30,000km ago, the Dealer replaced the LCA bushes...No squeeks from them also...
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Re: Suspension Shudder

Postby Brunsy3.0 » Wed Sep 10, 2014 9:25 pm

Wheel balance?
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Re: Suspension Shudder

Postby specwarop » Wed Sep 10, 2014 9:28 pm

Ive never known of a wheel balance causing that sort of wobble? Also, would it be a random wobble if out of balance?
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Re: Suspension Shudder

Postby Brunsy3.0 » Wed Sep 10, 2014 9:44 pm

Usually speed dependant cant vary the type of wobble and severity to how for out the balance is and where on the car it comes from
Possible tierod nuts loose?
Wheel studs tensioned?
Tyres separating?

A thousand possibilities hard to point the blame having not experienced it first hand. Through steering wheel or car wobble?
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Re: Suspension Shudder

Postby specwarop » Thu Sep 11, 2014 9:34 pm

I did feel it a little in the steering wheel yeh.
It is wierd that it only just started since replacing the parts.
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Re: Suspension Shudder

Postby Brunsy3.0 » Thu Sep 11, 2014 9:54 pm

Didnt rotate tyres or anything aswell? Is your steering nice and sharp? Checked power steering levels? Could have a little bit kf air in the system? This made mine shake badly at certain angles. Didnt do a flush of fluids?
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Re: Suspension Shudder

Postby specwarop » Thu Sep 11, 2014 9:57 pm

Nah no tyre rotation, levels are high. Steering seems fine yeh.
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Re: Suspension Shudder

Postby Brunsy3.0 » Thu Sep 11, 2014 10:09 pm

Shuddering over bumps or on flat surface? At certain speeds only? I know you said 100 but if you go 90 is it there but less noticeable or not at all?
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Re: Suspension Shudder

Postby specwarop » Thu Sep 11, 2014 10:15 pm

I haven't noticed anything else out of the ordinary really.
It has only shuddered on two occasions. Both times I was going about 100kmh (cannot accurately say).
And I cannot replicate the wobble by shaking the car around or whatever.


Having said that, with these Liberty's, how loud is normal road noise supposed to be.
Since I bought it I have wondered, but was told its a Subaru thing.
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Re: Suspension Shudder

Postby Brunsy3.0 » Thu Sep 11, 2014 10:19 pm

Road noise is highly dependant on tyre tread and rubber compound. Some treads are louder than others theres a few threads on here outlining peoples experiences with certain treads
My first thought was wheel balance but if its intermittent than possibly not. Stock rims?
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Re: Suspension Shudder

Postby specwarop » Thu Sep 11, 2014 10:34 pm

Yep stock 18" rims.
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Re: Suspension Shudder

Postby Brunsy3.0 » Thu Sep 11, 2014 10:54 pm

Hmmm the random occurrence makes it hard to pick
I was only askin about wheels incase of hubcentric spacers etc. But thats irrelevant for stockies
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Re: Suspension Shudder

Postby specwarop » Thu Sep 11, 2014 10:57 pm

Yeh its got me beat. Gonna have to get a Pedders 28pt Check...
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