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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
  
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| Wheel alignment height - std height or lower? |
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Apart from possible height correction due to tight tolerance mode, is wheel alignment height lower than normal height? It seems inappropriate to me but it has been mentioned by 2 people who work at different dealerships that wheel alignment is done at less than normal height. If this is true, does anyone know how much lower and is this for both front and rear?
Thanks
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 9th Oct 2010 8:48 am |
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Renton
Member Since: 13 Jan 2009
Location: Somewhere in the middle
Posts: 1718
 
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Had 2 wheel alignments in the past year and à half at two different places. One of them à lr specialist. Never seen them change the height. What would be the advantage? CLUB ILLEGAL CAR WASHERS
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| 9th Oct 2010 9:50 am |
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~Rich~
Member Since: 16 Mar 2009
Location: Sydney
Posts: 627
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I can understand your questioning Graeme, what would be also good to know is how much -20mm / +30 / +50 off standard height (If this is the actual height that the wheel alignment is done!) affects the camber and castor angles.
Therefore changing the wear on the tyres. 2005 TDV6 HSE Silver, LLAMS Height Controller, Tinted Glass, Onroad - 19" GG AT's, Offroad - 18" 275/65 MT, Traxside Dual Battery kit, Rasta Protection Plate, Alpine Roof, BAS Remap, ARB Air Compressor, eDiff  Custom Drawer and storage unit -http://www.box.com/s/jem0ilac3cner2mexq64 UHF CB, 4x4 Intellegence RWC, 120ltr Long range tank, Rock Sliders and Compressor protection plate Beanie grill, De Tango.
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| 9th Oct 2010 10:17 am |
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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
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One person said that LR Aust was attempting to simulate wheel alignment height by placing weights in the vehicle so that wheel alignments could be done when away from dealerships. I couldn't see this achieving anything as the air suspension would self level (unless a door was left open), let alone there being a reason to do the alignment at other than normal height. But if it is lower, it might be a lot more useful than -20mm.
Last edited by GraemeS on 9th Oct 2010 11:33 am. Edited 1 time in total
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| 9th Oct 2010 11:25 am |
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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
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Hi Rich,
I suspect -20mm doesn't change the toe-in much because that's the standard high-speed height but expect +50mm would and +30mm also likely. Off-road height is normally for off-road use, not sealed surfaces.
Camber changes a lot but I suspect the caster is not affected.
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| 9th Oct 2010 11:32 am |
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Bodsy
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Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
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I would have thought that it would be in std height as that is the height it will be used the most.
The dealer should put the car suspension into Tight Tollerence Mode before doing the alignment  Bodsys Brake Bible
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| 9th Oct 2010 2:52 pm |
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caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
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Graeme, I think they are talking about the tight tolerence mode tht bodsy mentioned. It sets it at about standard off road height and stops it self leveling.
It is the most accuate way of doing it, others have done it without TTM andf have had no major wear issues. “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
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| 10th Oct 2010 1:41 am |
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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
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Hi CaverD3,
I am trying to discover if there's any height change in addition to any that might occur as a result of tight tolerance mode causing the height to be closer to normal height specifications. Pre-TR L322 docs show normal tolerance is +/- 5mm so I suspect TTM to be something like +/- 3mm so some adjustment could occur when TTM is selected. I acknowledge that D3 normal tolerance may not be the same as the pre-TR L322.
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| 10th Oct 2010 5:01 am |
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caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
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I think it could be the lack of self leveling may cause the vehicle to be lower if you fill the tank. Full tank is reccomended for both height calibration and wheel alignment. But I don't think it is much different from normal on road height. Without measuring the heights on a level surface before and after it is put in TTM then difficult to be certain.
Why are you needing to know? “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
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| 10th Oct 2010 6:47 am |
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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
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caverD3 wrote:Why are you needing to know?
My vehicle needs a wheel alignment (I suspect insufficient caster on LF wheel) and the closest dealer is a couple of hours drive away yet I can get wheel alignments 30 mins drive away. If it is lower than normal height then I could provide that height instead of my current -20mm.
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| 10th Oct 2010 9:30 am |
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caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
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Running at -20mm would explain excessive wear. 
I would suggest if you are running on road at -20mm then I would just get an alignment done at that height without TTM, just make sure it settles before they attach the equipment. If you were close to a dealer I would see if it can be put into TTM with your kit set at -20mm with lengthened rods it would be ok as the sytem just assumes it is at standard, not sure how your kit integrates though. Given you are a long way from the dealer it would be better than running with the alignment done for standard height. “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
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| 10th Oct 2010 9:42 am |
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GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
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Excepting for a couple of occasions on freeway interchanges, I have used std height on all sealed surfaces and will continue to do so. Wear on the outside of the left front only and constant pulling to the left yet all wheels have good balance indicates an alignment problem with that wheel.
I have been told that alignment without TTM having been set results in poor tyre wear. If TTM was to also lower the vehicle then not setting TTM for an alignment would contribute to poor wear. However if its only closer tolerance to standard height then I can't do anything about that. Perhaps it could be of benefit if the left front wheel was set to the same caster and camber specs as the right wheel although toe-in would then need adjustment.
Maybe Black Box needs to add TTM set/unset functions to Faultmate!
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| 10th Oct 2010 11:31 am |
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caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
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Ask wiggs about faultmate.
If you do search on "wheel alignment" you will find the general consensus is to put it in TTM but there are many who have done it without and not experienced issues with uneven wear. There is a lot of info even the specific settings for the alignment.
It would be interesting to see how much the alignment changes with the vehicle height. I supect it may not alter greatly due to the geometry of the suspension.  If you get it done see if they will raise and lower it and measure again at each setting.
I would just get it done witout TTM and monitor the wear.
If you get it done see if they will raise and lower and measure again. “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
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| 10th Oct 2010 12:42 pm |
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