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Howling/vibrations after 4" suspension lift

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12 Jul 2016 15:21 - 12 Jul 2016 15:54 #169918 by MattB12
Hi guys, I've got a 2007 1.3 VVT Jimny. I've just fitted a 4" suspension lift with castor corrected arms all round, adjustable panhard rods and front prop spacer.

The axles 'look' to be centered and i still need to do the tracking. I'm running 205/75/15 tyres on 15x7 rims with the plan to fit 31's soon.

My problem is, when driving an aggressive vibration through the whole car can now be felt. It sounds like a howl and gets louder the faster I go. It feels like it's coming from the center of the car going back towards the rear.

It seems to be matched to road speed and not engine speed, if I push the clutch in at 30mph to drop the revs the noise and vibes are still there.

I've removed the rear prop and tried driving around on the front two and it became a lot less noticeable, in fact it felt like it disappeared. Put the prop back on and the vibes and noise come back.

If the axle is off center, even slightly, could it cause this?

I've read in another thread where the OP had a similar problem. They had to fit a rear prop spacer as well to cure it. For an 07 Jimny do you think a rear prop spacer is needed for a 4" lift?

Many thanks :)

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop
Last edit: 12 Jul 2016 15:54 by MattB12.

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12 Jul 2016 19:51 #169935 by MattB12
Whilst i'm trying to figure this out, would any harm come to driving around with the rear prop off in 4WD using the front?

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop

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12 Jul 2016 20:02 #169937 by X8GGY
Have you still got the original transfer box and prop fitted then?...

I'm not sure, but I wouldn't have thought a standard rear prop (with the CV thing on the t-box end) would cope with a 4" lift?...

:unsure:

Is that buggy finished yet?...

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12 Jul 2016 20:11 #169938 by viciouspenguin
It's too short and probably right at the limits of extension and about to pop out.

Use an SJ series front prop on the rear if I remember right.

silverjimny.co.uk
bigbox-3d.com

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12 Jul 2016 20:57 #169941 by MattB12
Yes the original Jimny transfer box and props are still fitted. Thanks, I'll keep a look out for an SJ front prop, I believe they are rare though.

Would a spacer on the diff end of the prop be enough?

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop

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12 Jul 2016 21:00 - 12 Jul 2016 21:01 #169942 by viciouspenguin
You could always get one made, that's what I did when I did a 4" lift.

www.baileymorris.co.uk/en/4x4-extreme-land-rover

EDIT | Install - sj410.co.uk/charger/garage/100412.html

silverjimny.co.uk
bigbox-3d.com
Last edit: 12 Jul 2016 21:01 by viciouspenguin.

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12 Jul 2016 21:25 #169944 by MattB12
Thank you mate, how much did that cost?

If the prop is too short and on it's limits, would that cause this noise and vibrations i'm getting?

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop

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12 Jul 2016 21:28 #169946 by viciouspenguin
I can't remember exactly but it was a few hundred. I would just go for a basic one, the double UJ was a bit overkill :)

I could cause the vibration, I would poke around underneath to double check things. Check the UJs are ok too.

silverjimny.co.uk
bigbox-3d.com
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12 Jul 2016 21:40 #169948 by OllieNZ
It may also be the nose of the rear diff has been dropped to far with the caster correction. It should really be pointing at the output of the transfer case. A spacer would definitely be a good place to start.
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12 Jul 2016 21:45 #169949 by MattB12
OK thanks a lot :) I'll bear that in mind for now.

Would a spacer on the diff end help push it back in?

Just a thought, i have some 31" tyres on the way, because they are going to raise the axle a bit would that help put the prop back within it's limits? Or is that logic a bit skewed.

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop

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12 Jul 2016 21:47 - 12 Jul 2016 21:50 #169950 by MattB12
Edit: just seen your response OllieNZ regarding the spacer, thank you.

@ VP - Yes, I also gave the UJ a good eyeballing when the prop was off, I think the prop itself is fine.

2007 1.3 VVT Jimny
31 x 10.5 GT Radial Adventuro M/T
15x7 -30 modular rims
4" suspension lift (Procomp ES1000)
4" Castor corrected front & rear arms
HD adjustable panhard rods
Front prop spacer
HD extended rear prop
Last edit: 12 Jul 2016 21:50 by MattB12.

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12 Jul 2016 21:56 #169951 by viciouspenguin
Bigger tyres won't change it, but a prop spacer will. Presumably the radius arms are corrected for the lift and you haven't used standard ones?

silverjimny.co.uk
bigbox-3d.com

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