Chasing suspension issue (1 Viewer)

[jtcu]

2013 LX570
I've been chasing a ride quality issue, I thought I had it fixed but turned out to be wrong. I test drove another LX570 and it didn't have the same drivability issue. I attached my gopro to various points of the car and hope that I've isolated it to the rear wheels. This video is going about 20mph over smallish bumps and it appears the wheel comes of the ground, does anyone see anything that I should diagnose? I took it to 2 different lexus dealerships and they were only able to tell me that the shocks weren't leaking so they were good. Thanks in advance.

 

[jtcu]

This is the same bump from the passenger's side. You can even hear something rattling/popping?

 

[TeCKis300]

Your links to google drive don't have permissions for us to view.

 

[jtcu]

Your links to google drive don't have permissions for us to view.

Fixed? I changed permissions but I may have to update the link.

 

[TeCKis300]

Yup!

 

[jtcu]

Front Right, you can hear the rattle noise muffled so I'm thinking the problem is at least near the rear right?

 

[jtcu]

Not sure if there's any helpful information in these numbers but I finally got techstream up and running. If anyone sees anything off please let me know?

 

[grinchy]

Interested to see what the diagnosis is . . .

 

[CharlieS]

It seems like there isn't enough rebound or dampening. In a "regular" suspension, I'd say the shock is shot, but since you have AHC, I have no idea.

 

[TeCKis300]

Can you take a picture of the suspension globes. You can see them underneath between the frame rail and side steps.

I know you said they were replaced. All of them? Many of your symptoms are consistent with failed suspension globes. It just doesn't seem to have the right suspension impact handling. From your vids, the tire is rolling straight and true and not really deflecting, which leads me back to suspension.

 

[jtcu]

Can you take a picture of the suspension globes. You can see them underneath between the frame rail and side steps.

I know you said they were replaced. All of them? Many of your symptoms are consistent with failed suspension globes. It just doesn't seem to have the right suspension impact handling. From your vids, the tire is rolling straight and true and not really deflecting, which leads me back to suspension.

 

[TeCKis300]

They do look fairly new.

The other main component governing damping is the damping force controllers. It is what the globes mount to. I don't know if a failure in the motors or controllers here would show a MIL code. Or there's potential for debris or contamination of the orifices where it's unlikely to report errors.

If you believe the problem is at the rear axle, you might try replacing the two at the rear. Indicated as No.1 gas chamber in this diagram, but it is the component the globes mount to. Might be able to get take-offs to minimize the expense.

 

[grinchy]

I like where @TeCKis300 is going, but I wonder if it might just be the shocks are done . . . I understand they are nothing but fluid containers, but they do have valving in them, and perhaps it's just a mechanical failure in the shock. Not an expert on this for sure, just guessing.

Bonus, shocks are not expensive. . . .

 

[jtcu]

I like where @TeCKis300 is going, but I wonder if it might just be the shocks are done . . . I understand they are nothing but fluid containers, but they do have valving in them, and perhaps it's just a mechanical failure in the shock. Not an expert on this for sure, just guessing.

Bonus, shocks are not expensive. . . .

Apparently these are pretty expensive, around 1k for the front installed if I recall correctly. They've said they are good because they aren't leaking but like you said I wonder if something else can be wrong with them without leaking?

 

[jtcu]

They do look fairly new.

The other main component governing damping is the damping force controllers. It is what the globes mount to. I don't know if a failure in the motors or controllers here would show a MIL code. Or there's potential for debris or contamination of the orifices where it's unlikely to report errors.

If you believe the problem is at the rear axle, you might try replacing the two at the rear. Indicated as No.1 gas chamber in this diagram, but it is the component the globes mount to. Might be able to get take-offs to minimize the expense.

View attachment 2359541

It looks like $800 for a used one, is there any sort of diagnostics I can do or is it a try and see only type of thing?

 

[grinchy]

I guess depends where you're looking.

 

[jtcu]

I guess depends where you're looking.

View attachment 2359587

Supposedly the back are much cheaper to install as well.

 

[turbo8]

If you want any component to try and swap out, pay for shipping and you can have any of my used parts.

 

[jtcu]

If you want any component to try and swap out, pay for shipping and you can have any of my used parts.

Bet! I'll take whatever you have that you think might help. I can send you a prepaid shipping label.

 

[TeCKis300]

I like where @TeCKis300 is going, but I wonder if it might just be the shocks are done . . . I understand they are nothing but fluid containers, but they do have valving in them, and perhaps it's just a mechanical failure in the shock. Not an expert on this for sure, just guessing.

Bonus, shocks are not expensive. . . .

This is absolutely plausible as well! I'd attack this before attacking the what I suggested.