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Take it to your dealer for the L-SB-0015-21 TSB fix which involves replacing left spring. The tolerance for the lean fix is 20mm or greater so you are covered.
Oh well I guess it is what it is. Better than my ‘18 GMC with a leaking head gasket at 3k miles I suppose. That got fixed and it’s still going strong at 55k miles with my lead foot!
I would not recommend doing the TSB. Based on some other posts, it doesn’t always work. It also doesn’t make sense to install 1 shorter spring which is not directly connected to the kdss system. I’m in the same boat having taken delivery of a brand new GX, and having the lean with less than 100km on the vehicle. I will give it time and will measure with a level on the rear bumper from time to time to see if it auto corrects itself. I would do the measurement always while parked in the exact same spot in the garage.
If nothing changes, I would look into having the system adjusted rather than removing a spring and replacing it with a shorter one. There was a video on this thread relating to it.
For now I will see how it goes and will try to learn more about the kdss and how it works so I can better understand why it created the lean in the first place.
I would not recommend doing the TSB. Based on some other posts, it doesn’t always work. It also doesn’t make sense to install 1 shorter spring which is not directly connected to the kdss system. I’m in the same boat having taken delivery of a brand new GX, and having the lean with less than 100km on the vehicle. I will give it time and will measure with a level on the rear bumper from time to time to see if it auto corrects itself. I would do the measurement always while parked in the exact same spot in the garage.
If nothing changes, I would look into having the system adjusted rather than removing a spring and replacing it with a shorter one. There was a video on this thread relating to it.
For now I will see how it goes and will try to learn more about the kdss and how it works so I can better understand why it created the lean in the first place.
I think it is ridiculous to have a $70k+ vehicle that leans an inch or more and then not do anything about it. And why would you not have it fixed when there is a Lexus approved TSB? What are the downsides? If there was a downside we would have heard about it by now since the TSB has been around since 2013.
I did the TSB myself and here are the observations. When comparing the old spring and the new TSB-spec spring, there is no discernable differences. I did not take precision measurements but the new spring did not appear shorted to the naked eye. Also did you know that from the factory, the left and right spring are not the same part number already? Also this is the case which pretty much every vehicle.
I have driven my GX now for about 5000 miles after the change and it doesn't lean and there are no ill effects.
As far as the videos that are out there for 200 series Toyotas that lean, they say to open up the bypass valve on the KDSS controller and then jack up one side of the vehicle, then close the valve. I tried that and it doesn't work on the GX.
After taking the stab bar off to change the left spring, I noticed the left KDSS cylinder acts like a spring itself. I had to use a floor jack and ratchet straps to get the bar reattached and force it back into place. So I believe what is going on is due to the KDSS cylinder force acting on the control arm, it is lifting that side of the vehicle, For what ever reason Lexus let this go. I know the KDSS system has a pressure range that it specified in the SM, I thought perhaps if the pressure is reduced that could level the vehicle. Special tools are needed to change/adjust pressure in the system, so I did not mess with it. Note I spoke with the folks at Dr KDSS and they told me what I needed to change the system pressure.
I think it is ridiculous to have a $70k+ vehicle that leans an inch or more and then not do anything about it. And why would you not have it fixed when there is a Lexus approved TSB? What are the downsides? If there was a downside we would have heard about it by now since the TSB has been around since 2013.
I did the TSB myself and here are the observations. When comparing the old spring and the new TSB-spec spring, there is no discernable differences. I did not take precision measurements but the new spring did not appear shorted to the naked eye. Also did you know that from the factory, the left and right spring are not the same part number already? Also this is the case which pretty much every vehicle.
I have driven my GX now for about 5000 miles after the change and it doesn't lean and there are no ill effects.
As far as the videos that are out there for 200 series Toyotas that lean, they say to open up the bypass valve on the KDSS controller and then jack up one side of the vehicle, then close the valve. I tried that and it doesn't work on the GX.
After taking the stab bar off to change the left spring, I noticed the left KDSS cylinder acts like a spring itself. I had to use a floor jack and ratchet straps to get the bar reattached and force it back into place. So I believe what is going on is due to the KDSS cylinder force acting on the control arm, it is lifting that side of the vehicle, For what ever reason Lexus let this go. I know the KDSS system has a pressure range that it specified in the SM, I thought perhaps if the pressure is reduced that could level the vehicle. Special tools are needed to change/adjust pressure in the system, so I did not mess with it. Note I spoke with the folks at Dr KDSS and they told me what I needed to change the system pressure.
Thanks for the detailed explanation and sharing your experience. That’s really helpful. I may give it some time before doing the TSB just to see if maybe it corrects itself over the course of driving as well as with different loads in the vehicle. Still less than 200 km and it’s just been me inside it so far.
I did speak to a service manager prior to taking delivery of the car regarding the lean. He was aware of it but said it’s normal behaviour and should level out. He has a GX as well but not sure if they’re trained to say that it will be fine.
I’ve got the lean and the KDSS trick doesn’t do anything. I also noticed my CV axles have some negative pitch in them (slope up toward the wheel. So does that mean I have sagging springs also? I was thinking of installing the new front left spring from the service bulletin but now I’m worried I need to replace both. Maybe just replace with aftermarket?
thoughts?
Last edited by Joshthemule; Mar 19, 2024 at 07:00 PM.
Reason: Additional data
I’ve got the lean and the KDSS trick doesn’t do anything. I also noticed my CV axles have some negative pitch in them (slope up toward the wheel. So does that mean I have sagging springs also? I was thinking of installing the new front left spring from the service bulletin but now I’m worried I need to replace both. Maybe just replace with aftermarket?
thoughts?
How many miles on the GX and what year?, apologize in advance if I missed it form earlier post.
I also noticed my CV axles have some negative pitch in them (slope up toward the wheel. So does that mean I have sagging springs also?
No. Also the service manual provides correct ride height measurements so you can see if it is in spec.
I was thinking of installing the new front left spring from the service bulletin but now I’m worried I need to replace both. Maybe just replace with aftermarket?
Well if you want to lift it, then there are aftermarket options, search the forum.
