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Hydraulic suspension/ Height adjustment

 
Old 03-15-19, 07:17 AM
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Ftcgsf
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Default Hydraulic suspension/ Height adjustment

I was wondering with the LX 570 when the body( hydraulic height adjustment ) is in the highest setting, can it be left there when driving at any speed or does it automatically lower itself back down over a certain speed limit ?

I know the ground clearance of the LX 570 does not change even in the heighest setting, but I was more curious if you could leave the LX set in high at any speed to take advantage of the improved approach and departure angles.
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Old 03-15-19, 08:39 AM
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Originally Posted by Ftcgsf View Post
I was wondering with the LX 570 when the body( hydraulic height adjustment ) is in the highest setting, can it be left there when driving at any speed or does it automatically lower itself back down over a certain speed limit ?

I know the ground clearance of the LX 570 does not change even in the heighest setting, but I was more curious if you could leave the LX set in high at any speed to take advantage of the improved approach and departure angles.
If your turn the height adjust with to "Off" position, the height position will be remaining at your last adjusted position.
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Old 03-15-19, 08:54 AM
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Originally Posted by hzhao View Post
If your turn the height adjust with to "Off" position, the height position will be remaining at your last adjusted position.
so what you are saying is I can drive down the road at say 50 mph in the highest setting and the LX will not lower itself ?
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Old 03-15-19, 10:13 AM
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Originally Posted by Ftcgsf View Post


so what you are saying is I can drive down the road at say 50 mph in the highest setting and the LX will not lower itself ?
Yes. You have to do this while vehicle is in stop:



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Old 03-15-19, 10:27 AM
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Originally Posted by hzhao View Post
Yes. You have to do this while vehicle is in stop:

thank you.

i thought that if you had the LX at its highest height setting that when you went over 20 mph or when you hit highway speeds the LX automatically dropped back down to the lowest vehicle height settings for aerodynamics.

But what you are saying is that while the vehicle is in stop, adjust it to the highest setting and it will stay elevated at faster speeds.


Thank you.
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Old 03-15-19, 11:40 AM
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There's some confusion here. First is confusing the stance the LX automatic height adjustment sets for the LX at higher speeds with the "High" position. The high position set by the console switch is for off-road use, when on trails or crossing water where an increase in vehicle ground clearance is desired by the driver. The automatic high speed stance is not the same as this; it is a "rake" change in stance to slightly alter aerodynamics and slightly increase fuel economy. That's why, when you slow and stop after a high speed run, you may feel the back of the vehicle squat down slighlty. Depending on your senses, it may feel to others like the front of the vehicle rises up.

When you engage the "high" setting while at rest, and then push the "off" button, the whole vehicle remains at the raised height UNTIL you reach a certain forward speed. If you are off-roading and going slowly, the LX will remainin the high position. But once you reach a certain forward speed, the AHC "off" light automatically goes off, and the LX lowers itself to the "normal" height. I just came back from verifying this, and my LX automatically turned off the "off" light and spontaneously lowered itself at approximately 15 mph. Having the AHC button "off" will not prevent this automatic lowering to normal height.

I'm assuming my LX works like all the others. I've had two of them, and the AHC worked the same way in my older one as it does in the one I have now.
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Old 03-15-19, 11:46 AM
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Originally Posted by Reggie1 View Post
There's some confusion here. First is confusing the stance the LX automatic height adjustment sets for the LX at higher speeds with the "High" position. The high position set by the console switch is for off-road use, when on trails or crossing water where an increase in vehicle ground clearance is desired by the driver. The automatic high speed stance is not the same as this; it is a "rake" change in stance to slightly alter aerodynamics and slightly increase fuel economy. That's why, when you slow and stop after a high speed run, you may feel the back of the vehicle squat down slighlty. Depending on your senses, it may feel to others like the front of the vehicle rises up.

When you engage the "high" setting while at rest, and then push the "off" button, the whole vehicle remains at the raised height UNTIL you reach a certain forward speed. If you are off-roading and going slowly, the LX will remainin the high position. But once you reach a certain forward speed, the AHC "off" light automatically goes off, and the LX lowers itself to the "normal" height. I just came back from verifying this, and my LX automatically turned off the "off" light and spontaneously lowered itself at approximately 15 mph. Having the AHC button "off" will not prevent this automatic lowering to normal height.

I'm assuming my LX works like all the others. I've had two of them, and the AHC worked the same way in my older one as it does in the one I have now.
Thank you very much. This is what I thought, but I was not entirely sure.
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Old 03-15-19, 03:29 PM
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Originally Posted by hzhao View Post
If your turn the height adjust with to "Off" position, the height position will be remaining at your last adjusted position.
Until you drive 1 mph faster than the truck's preset lowering limit speed...which, by the way, you cannot change.

Originally Posted by hzhao View Post
Yes. You have to do this while vehicle is in stop:
NOT correct.

Originally Posted by Reggie1 View Post
There's some confusion here. First is confusing the stance the LX automatic height adjustment sets for the LX at higher speeds with the "High" position. The high position set by the console switch is for off-road use, when on trails or crossing water where an increase in vehicle ground clearance is desired by the driver. The automatic high speed stance is not the same as this; it is a "rake" change in stance to slightly alter aerodynamics and slightly increase fuel economy. That's why, when you slow and stop after a high speed run, you may feel the back of the vehicle squat down slighlty. Depending on your senses, it may feel to others like the front of the vehicle rises up.

When you engage the "high" setting while at rest, and then push the "off" button, the whole vehicle remains at the raised height UNTIL you reach a certain forward speed. If you are off-roading and going slowly, the LX will remainin the high position. But once you reach a certain forward speed, the AHC "off" light automatically goes off, and the LX lowers itself to the "normal" height. I just came back from verifying this, and my LX automatically turned off the "off" light and spontaneously lowered itself at approximately 15 mph. Having the AHC button "off" will not prevent this automatic lowering to normal height.

I'm assuming my LX works like all the others. I've had two of them, and the AHC worked the same way in my older one as it does in the one I have now.
That's the only correct answer here.

Nice if people actually tried what they're advising
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Old 03-15-19, 03:48 PM
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Originally Posted by hankinid View Post
Until you drive 1 mph faster than the truck's preset lowering limit speed...which, by the way, you cannot change.


NOT correct.


That's the only correct answer here.

Nice if people actually tried what they're advising
Thank you very much for the confirmation . And the explanation just prior to yours was excellent as well. I am debating on trading in my ford raptor for the LX, and I am just trying to due a full depth comparison in terms of off road capability, ride height, and approach and departure angles among other things.
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Old 03-15-19, 06:09 PM
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You can increase the speed at which the lx lowers if you drive in low gear. If you drive normal (high gear) it'll lower at around 19 mph.
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Old 03-15-19, 06:15 PM
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Originally Posted by jat0223 View Post
You can increase the speed at which the lx lowers if you drive in low gear. If you drive normal (high gear) it'll lower at around 19 mph.
Mechanically, is it safe to drive the LX in low gear at higher speeds for extended periods of time ?
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Old 03-15-19, 10:03 PM
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Originally Posted by Ftcgsf View Post
Thank you very much for the confirmation . And the explanation just prior to yours was excellent as well. I am debating on trading in my ford raptor for the LX, and I am just trying to due a full depth comparison in terms of off road capability, ride height, and approach and departure angles among other things.
Originally Posted by Ftcgsf View Post
Mechanically, is it safe to drive the LX in low gear at higher speeds for extended periods of time ?
We do it in the woods, given a decent road. On paved roads, it's simply a waste of fluid, plus obviously more wear and tear on the drivetrain. Same with the Raptor or anything else with a low range transfer case.

Good luck with an apples to oranges comparison, imo they're two very different trucks.
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Old 03-16-19, 02:59 PM
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Also, interestingly, if the LX is in 4low and is stuck, wheels turning and vehicle going nowhere, the vehicle will automatically raise its self up even more. About another inch. I was stuck off the side of the road on snow that was over ice at all 4 wheels. Hi mode, center diff locked, 4 low and in crawl mode and the truck was going nowhere. Once I was pulled out by the neighbor I stepped back and looked at the LX and couldn’t believe how high it was sitting!

Another thought, the reason the vehicle doesn’t stay in high mode at higher speeds is due to rollover safety and keeping a lower center of gravity in a 6,000lb vehicle. Additionally when the vehicle is in the High or Low height setting (not “N” or Normal) the wheel alignment is off and would cause unusual handing and tirewear at speed or for a long amount of distance.
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Old 03-16-19, 04:08 PM
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Originally Posted by UCrazyKid View Post
Also, interestingly, if the LX is in 4low and is stuck, wheels turning and vehicle going nowhere, the vehicle will automatically raise its self up even more. About another inch. I was stuck off the side of the road on snow that was over ice at all 4 wheels. Hi mode, center diff locked, 4 low and in crawl mode and the truck was going nowhere. Once I was pulled out by the neighbor I stepped back and looked at the LX and couldn’t believe how high it was sitting
We get the same ~1.5" when things get slippery on our '01.
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