Strange Vibrations - Fading in & out wheel shimmy @ 80-100 km/hr

[esamari]

Hi All,

I have been getting a strange wheel shimmy on my 2015 110. Tyres have been road force balanced and wheel alignment done.


The shimmy is slight but I need to get it rectified, if I can find the problem.

At highway speeds I can have smooth driving and as I go around a long curve on the HW the shimmy will fade in and out. It lasts about 10 seconds and then goes smooth again.

I have checked the bearings and there is no movement, and am thinking this may be a swivel housing seal or CV joint issue. Anyone else experience this and found the source?

[rick130]

Swivel pre-load too low, panhard rod clevis bolt loose or bushes buggered or even a buggered shock can cause shimmy, although with a dodgy damper you really need to hit a bump during cornering to set it off

When the alignment was done, did they give it toe out?
A lot of shops that have never done a full time 4wd Land Rover before set toe in instead of toe out

[esamari]

Thanks Rick. Just checked and they are set at 0 for both left and right. There was no change in the shimmy. It was same before and after alignment.

[rick130]

0 will be fine.

The specs are 0-2mm toe out

[Tote]

Tyre condition? I have had some really weird vibrations with tyres that are down to their last 25%

Regards,
Tote

[muddy]

Try a tyre rotation had similar problem or you may have to buy new front tyres

[esamari]

Tyres have >70% thread left. I have rotated tyres a couple of times now with no luck. I'll start with bushes and the the swivel preload, seals etc as Rick mentioned. Steering Damper is in good condition and I have tried a couple of different ones to see if it was the damper and am sure thats not it.

[HardCharger]

Sorry, double post

[HardCharger]

Did you re-balance the tires? It's usually good practice to re-balance the tires when you rotate them. I've always done this and had no problems.

Another thing to look at is perhaps your suspension bushings need replacing already.

[esamari]

Checked the panhard bracket bolts that attach to the chassis on the driver side today and seemed to need a bit tightening. Checked manual and tightened to 123 ft lb as per manual. Shimmy was reduced quite a bit. I think I'll do the panhard bushes next as they probably deteriorated a bit from the vibration. I am leaning towards genuine bushes but would poly pros be better?

[rick130]

Super Pro are good, the factory ones should be fine there, just make sure there isn't too much clearance between the steel crush tube and bolt.
I've shimmed a couple over the years with shim stock wrapped inside the crush tube.

[Phil B]

Don’t forget to check the bolts on the damper and panhard. Worn or incorrect sized bolts can also cause the wobbles

[Mudnut]

Just replaced my front shocks. Had 15yo Bilstins in, and the RH one was knackered. Put in Koni Raid 90's. Got rid of the steering wander, and death wobbles when I hit bumps during cornering. Could also be the rubber bushes on your shocks???

Jost some more things to check.

Cheers,

Ken

[350RRC]

If you go poly, Super Pro are great. i.e. the one and only.

DL