Afternoon All,

Hope you're enjoying the F1

Anyway, I know this is a well known topic and I've suffered from it on the past. However, I've had the wheels balance properly (newest Hunter machine) and there where no vibrations at all.

Steering has been checked and all is good, 4 wheel alignment ditto but the cursed vibrations between 80-100kph are back

So what could this be? I've been told the shocks/ dampers are on the way out especially at the rear, could this result in the vibrations?

If not what else should I check.

Thanks is in advance.

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Last edited by Guyzer73 on Sun Jul 30 2017 4:12pm. Edited 1 time in total

Tyre out of shape
Worn wishbone bushes
Wheel alignment
Warped hub flange

Does it wobble all the time, or only when braking?

Thanks Mikey,

Ok so vibrations are minimal when cruising or accelerating. They are at their worst when rapidly coming off the accelerator or after/ during breaking and then remain.

On your list I don't think it's the tyres as they're new and filled with nitrogen? To avoid them loosing shape in the heat... Wheel alignment is also good as I got this done with the new tyres.

I'll get the garage to check the hub flanges and wishbone bushes.

What are your thoughts what I said about the shocks and dampers?

Cheers

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Front CV joints, and possibly a diff fault too

Presumably all 4 tyres are the same brand/size?

Thanks again Mikey,

Yeah tyres are Pirelli all round. I'll get the CVs and diff checked out also, I have noticed a whiring sound coming from the rear diff I think l, especially on acceleration, not sure if that's related...

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Are the tyres the same pressure across the axle? I've found that a mismatch of pressures can cause a vibration. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Hi RRSTDV8, yep tyre pressure checked weekly always run 42psi all round.

Cheers

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Should be 33psi front and 36 rear...

Mikey,

I thought it was 38/42 when using the loaded vehicle figures? I found that the Sport has less steering wheel shake at this pressure. I'll give the 33/36 a try if you think that'll help but in my experience the lower pressure exasperated the problem...

Cheers


Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Excuse my interruption (and ignorance) ' but what is a hub flange ?
The reason I ask is I also have a slight steering wheel wobble since fitting a new wheel bearing ?

Guyzer

Back in 2008, I had the same problem and it was a rear diff, it took LR months to find the cause.

BKHK, thanks for that I'll get he garage to check when the car goes in at the end of the month.

Devon, I believe the hub flange is as per the image below:



Cheers

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

I had the hub give problems a few years ago on an x-trail. A garage replaced the bearing under warranty, and they warped the hub getting the old bearing out. They claimed it was ok but when I checked the run out of the hub it was oval. New hub cured it.

I have slight vibrations under braking but nowt I'm too worried about (at this stage).

But...

Sat the car up for the afternoon in Mid-France on Saturday, in the sun. It was about 27 degrees. Place was 1/2 mile from the A20, so coming down the slip-road and the wheel was shaking like a mad thing

Soon settled down to nothing. Never had heat deformation that bad before

With my current RRS (L320) there are a couple,of sections of freeway where I have a bit of steering shimmy but on most surfaces it's fine. I think that road surface does make a difference which is annoying as it's hard to diagnose.