Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Lowering from Off-Road to Access Height with foot on brake
Notice something odd for the first time tonight whilst in the queue at McDonalds DriveThru
Rolled up to Window #1 (order and pay) in Off Road height ( off by chav's behind me in a Citroen Saxo lowered to the point their arses were scraping the floor - was trying to suffocate them with my exhaust pipes blowing at their face level )
Then proceeded to lower down thru Normal Height to Access Height to partake in the transaction with the spotty urk behind the window. Height slight groans and when I took my foot off the brake the car appeared to lurch down another inch or so
I'm assuming this had something to do with something underneath being stressed by the inability to roll slightly - was just after a more technical explanation
Anyone care to comment?Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
13th Jan 2008 7:13 pm
countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
Mine does that, it is almost like transmission wind up in the old days of 4x4 without centre diff.
Either both of ours our broken or it is meant to do it.
13th Jan 2008 7:15 pm
simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
I think you were just 'stressing' it. As you say, your were not allowing the wheels to move while the suspension settled. Same on mine when I've done it. Groans sometimes too.
13th Jan 2008 7:26 pm
robsmith
Member Since: 02 Sep 2007
Location: Staffordshire
Posts: 2392
Shame they didn't park up, then you could have parked on top of them and given them the joy of seeing what a real set of big tyres looks like.
Trouble would then have been if yours had decided to sit down, its a bit of an escape trick to scrape them off the underside withoutt getting too much of their paint off
13th Jan 2008 9:57 pm
freebie2disco
Member Since: 01 Jan 2007
Location: wantage
Posts: 334
Yep mine has always done that from new. I always assumed that it was something in the suspension geometry that changes and causes it.
Does every one else when the low or high level is selected go down front first then the back, rather than level?
"I know that you believe that you understood what you think I said, but I am not sure you realize that what you read is not what I meant"
Yep!Too much intellectual firepower can damage your common sense.
14th Jan 2008 12:08 am
freebie2disco
Member Since: 01 Jan 2007
Location: wantage
Posts: 334
yep
14th Jan 2008 2:51 am
WillMyth
Member Since: 11 Jul 2007
Location: Tuam
Posts: 400
yep.
14th Jan 2008 3:51 am
garryc
Member Since: 08 May 2007
Location: Adelaide Hills
Posts: 259
Re: Lowering from Off-Road to Access Height with foot on bra
SN wrote:
Notice something odd for the first time tonight whilst in the queue at McDonalds DriveThru
Rolled up to Window #1 (order and pay) in Off Road height ( off by chav's behind me in a Citroen Saxo lowered to the point their arses were scraping the floor - was trying to suffocate them with my exhaust pipes blowing at their face level )
Then proceeded to lower down thru Normal Height to Access Height to partake in the transaction with the spotty urk behind the window. Height slight groans and when I took my foot off the brake the car appeared to lurch down another inch or so
I'm assuming this had something to do with something underneath being stressed by the inability to roll slightly - was just after a more technical explanation
Anyone care to comment?
You eat Maccas Hilux drivers food and OH! mine groans sometimes when lowering 8)2013 D4, E-diff, Vision pack
Never propose to a Yak
14th Jan 2008 6:08 am
DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
Yep, mine too. Always has.
Something I've not noticed until recently is that my dipped beams flicker when I adjust the height
when I took my foot off the brake the car appeared to lurch down another inch or so
I'd always just assumed that this was because the air suspension rams pointed slightly towards the centre of the vehicle (i.e. the rear ones point slightly forward and the front ones point slightly backwards). When you lower the suspension, you lengthen the wheel base. If you do it with the brakes on, you stretch the chassis.
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
It may be to do with the timing of the Front/Back - because they don't go at the same time, the wheelbase will lengthen/shorten during the process but ultimately end up the same at the end. Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
14th Jan 2008 9:08 am
AndrewS Tarquin of the Desert
Member Since: 06 May 2005
Location: Y...... because I can
Posts: 10438
Right
When the suspension is raised the track or the distance from left to right wheels decrease. When lowered it increases. The track difference between Off Road and Access is about 30 - 35mm. It wont fully raise or lower until you allow the track to change. So by allowing the car to roll when you release the brake the suspension can 'settle' into the setting/height selected. Or if you are on a slippy surface the tyres will slide sideways.
Think of it as standing with your feet together then with your feet 2ft apart you will be even shorter.In the Beginning there was nothing, which exploded.
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off by chav's behind me in a Citroen Saxo lowered to the point their arses were scraping the floor - was trying to suffocate them with my exhaust pipes blowing at their face level 
)
| 08MY Discovery 3 (history) 
Hilux drivers food 
and OH! mine groans sometimes when lowering 8)
