Rear Height Sensors after lift for GX460

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MotorboatMcGoat said:
I haven't driven at night yet, but after putting a 2.5" lift + 33's I'd think my headlights are now aimed too high?
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I never touched mine. Didn't mess with the washers at all. No errors, no issues with headlights. If the angle is different, it's so slight I have never noticed it 18 months in. Mine is 2.5 on the lift and I'm on 275/65 so about an inch and quarter lower than yours.
 
So, after driving a bit at night, my headlights are aimed at the moon. Not that bad, but I can see the faces of dudes in lifted full size F250’s.

When I add spacers, do I need to add them to both the left and right ride height sensors or just the passenger side?
 
You could just adjust your ride height sensor. There is room for adjustment on the linkage between the upper axle link and the sensor. I *think* if you adjust the link upward on the slotted adjuster it will result In the headlights aiming lower, because the sensor will think the rear of the vehicle is squatting.

Adjustment is easy, just a 10 mm socket and a 10 mm end wrench to hold the little ball joint in the link from turning.
 
I saw that, I’ll have to check on how much room I have for adjustment. Same question applies, do I need to adjust both sensors or just the passenger side? I can’t find anything in the service manual I have access to.
 
MotorboatMcGoat said:
I saw that, I’ll have to check on how much room I have for adjustment. Same question applies, do I need to adjust both sensors or just the passenger side? I can’t find anything in the service manual I have access to.
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Not sure as my Premium only has one sensor, on the passenger side. I don't know if the rear air suspension on the Luxury uses data from both sides or not, I agree it would be good to know before you fiddle with it.
 
I went ahead and just did the passenger spacers since that seemed most simple, and the headlights dropped. Success!

I had longer bolts already and added some washers. Based on my test drive just now I’ll likely need one or two more washers.
 
heliwill10 said:
Off topic... But, so can you trick the normal ride height with a luxury?
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Did you or anyone manage to make this work? I've tried and nothing changed. I have a small .75 spacer puck up front, so it's leveled, but wanted a little rake back. Am I doing it wrong? That was with 3 washers, but I went back and added 4, didn't move at all.

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Avssuc said:
Did you or anyone manage to make this work? I've tried and nothing changed. I have a small .75 spacer puck up front, so it's leveled, but wanted a little rake back. Am I doing it wrong? That was with 3 washers, but I went back and added 4, didn't move at all.

View attachment 4135221
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Assuming you adjusted both height sensors? They do not individually control driver and passenger airbags but there is some interaction between sensors if you monitor OBD-II values during adjustment.

What I found was ~3:1 ratio of height sensor adjustment to height change, so 1mm of washers = 3mm of ride height increase. FSM says 2mm of height sensor change = 3mm of ride height but looking at the suspension geometry, I think this is a typo.
 
Pardon the slightly divergent thread. I saw a ride height sensor on the rear passenger side while underneath the truck and wondered why it's there. I don't have the air ride system. I failed to notice if there was one on the driver's side too. So are these sensors used on non-air ride trim levels too? Maybe as part of the stability control system or other? The KDSS wouldn't need this input right?
 
^ Danke, I either have forgotten or never realized that feature existed lol. Do they actually work well or are they "problematic?"
 
On a stock vehicle they keep the headlights level even with heavy loads in the rear. If you disable them you do stand a chance of getting flashed by other drivers if load sags down the rear.
 
Acrad said:
On a stock vehicle they keep the headlights level even with heavy loads in the rear. If you disable them you do stand a chance of getting flashed by other drivers if load sags down the rear.
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Disabling them will also set off a flashing AFS light on your dash.
Ask me how I know...
 
Acrad said:
If you get a chance pull codes to see what specifically is causing the AFS Light to come on.
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I've looked, and I believe it happened when I had the original lift installed. Somehow they undid something. I've been like that for the past 8 years. I don't even see the AFS light when I'm driving any more.
Someday I'll have it looked, but it's pretty low on my "To-Do" list.
 
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