Front nose dropped 3cm on a slope, what is that from a D3?

[maxperformance]

Hi all,
I changed the tyres to 265/60/r18 few days ago and no problem.
But today.
I stopped at one traffic light today on a kind of down hill slope pointing the head downward. That was not a very steep slope (i think it would be about 10 degree at most). Suddenly the car dropped its nose about 3cm (both sides of the tyres on the front), not much but very obvious. Then soon when I drove the car through the intersection then the car came back to normal height.

Could someone explains to me what that behaviour means in a D3 TDV6 05?
Thanks for your time.

[Arapiles]

My D4 does that - the first time it happened I queried it on here and was told it's a normal part of the self-levelling function of the EAS.

BTW, had a couple of LC200s and LC100s towing caravans behind me on the highway yesterday and their lights were pointing up at the sky - there's a lot to be said for auto-levelling.

[josh.huber]

Yes it's normal, the worse the shocks get, the more it changes, anything above 10mm triggers a change. You get used it to it. It's the dash lights that become scary

[Macadamia]

probably has nothing to do with new wheels. just normal EAS operation. the EAS will self level to the ground so that all wheels are equal height. it will periodically reassess the height and has a tolerance of 10%

when you stop on a slope the weight distribution changes - more weight will be on the downhill wheel/s, compressing and lowering the suspension; and less weight on the uphill wheel/s, decompressing and raising the suspension. if you stop there long enough the EAS will release air from the uphill struts to return the corners to normal height and it will add air to the downhill struts.

if the slope is steep enough and you're carrying a bit of weight it can be quite dramatic

[BradC]

probably has nothing to do with new wheels. just normal EAS operation. the EAS will self level to the ground so that all wheels are equal height. it will periodically reassess the height and has a tolerance of 10%

My son asked the other day why the car farts pretty much every time we get out. I explained that it set the suspension height based on the load, and when we remove a couple of hundred kilos from the car it naturally raises up, at which point it adjusts itself back down again.

When you think about it in that context, all the other behaviour becomes easier to explain.

The tolerance according to the literature I can find is +/- 10mm with the engine running and +/- 20mm with the ignition off. There is a smoothing algorithm applied with a long time constant with the vehicle moving, and a shorter time constant with the vehicle stationary. That came from a training manual on the various LR air suspension units, so it may be relative to the Range Rover instead, but it's the only thing I've found with actual figures.

[maxperformance]

Thanks all.

That was a bit of scary moment when I thought my front gas shocks were both all gone.

@BradC: yeah, I am now get used to with the fart from my D3 everytime I get out of the car. [biggrin]