2017 rear end wobble (1 Viewer)

[btovtin]

2017 LC with 70k

I purchased a lc about 5 years ago and from day one I had this rear end wobble when going over bumps in the road. It’s almost like it was teeter totter side to side a couple inches and if you jerk the steering wheel it is unstable. It was a lease trade in from Michigan, does have some rust but not too bad. I have been chasing this for almost 5 years now and have $17k into it. It’s been to 3 different dealers- replaced entire kdss, shocks, tires,brakes. This is my last attempt before I get rid of it. Does anyone have any ideas what it could be?

Thanks in advance.

 

[kcjaz]

Any lift? The rear axle will move side to side as the suspension goes up and down. This can become more exaggerated with a lift as the panhard angle increases from horizontal at normal ride height. Search panhard bracket in this forum.

If no lift, and both weird going on with your panhard bar ( hard to imagine what that would be), then IDK.

 

[btovtin]

No lift. I was underneath looking at the panhard bar while my kids rocked it back and forth. Wasn’t sure what to look for though. Attachment points seemed tight.

 

[Zill]

This is a bit of a stretch. An idea would be to mount a camera on the underside of the car that’s looking at the rear suspension. Go drive over some bumps with the camera and review the footage to see if there is any unusual play in the suspension.

First thought comes to mind is the panhard bar, as that can lead to excessive side to side movement in the suspension if not within spec.

 

[TeCKis300]

IMO, I don't think there's anything wrong with your rig. It's the nature of a 5-link setup with panhard.

Some are very attune to the lateral movement created by a panhard bar. Others are oblivious adding a 3" lift without panhard correction and declare it as handling great. The OP sounds to be in the former category.

The stock LC suspension is very soft and allows quite a bit of compression stroke on even minor bumps. Even with the stock panhard biased to minimize sagitta (lateral movement) in compression, it is there. It was something I had to get use to also with Toyota body on frame SUVs, coming from finely tuned sports cars.

So what to do - I would recommend the OP consider a mildly digressive shock. This would mildly increase shock damping to better absorb bumps and better control the amount of suspension stroke. While having minimal impact on ride quality. A basic Bilstein shock upgrade could do wonders here.

 

[btovtin]

Thanks for the responses. How do I know if panhard bar is out of spec, is there an adjustment? I just replaced stock shocks with new stocks, but maybe consider aftermarket. Wish I could find one local to do a comparison drive.