Steering shimmy culprit?

[limeade]

So I recently picked up a 2020 wrangler rubicon and have a steering shimmy at highway speeds(video attached). I took a video of play in the track bar on the axle side that I’m thinking is the cause, wondering if you guys think it’s enough play to cause the shimmy I have.

In order to properly check the track bar, you need to look at the axle and frame mount. Re-do your video of both of these mounts but don't turn your tires so much. In the above video, you're inputting too much steering which is causing the tires to turn (as evidenced by your steering stabilizer moving). Only input enough steering left/right to impart a little bit of force into the steering system without actually causing the wheels and tires to move. By doing this, we can accurately see if there's any movement in either of the track bar bushings or mounts. There should be no movement at either of the bushings, bolts, or mounts.

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[m3reno]

I would have the tires high speed balanced. I'm still going to say it's the tires not balanced correctly. Do you have stock tires ? or over sized.

 

[dragoneggs]

It doesn't sound like tires to me. If it rides great on smooth pavement but not when aggravated by a rough road, then it seems something is loose or misaligned vs unbalanced tires. That's my 2 cents.

 

[roaniecowpony]

You can clearly see the axle moving laterally with steering input. It's the trackbar (soft/wornout) bushings. Put a good aftermarket trackbar on it and be done.

 

[501st_legion]

I would have the tires high speed balanced. I'm still going to say it's the tires not balanced correctly. Do you have stock tires ? or over sized.

I had them balanced but not rotated, may be the next thing I do

 

[Bandit59]

So I recently picked up a 2020 wrangler rubicon and have a steering shimmy at highway speeds(video attached). I took a video of play in the track bar on the axle side that I’m thinking is the cause, wondering if you guys think it’s enough play to cause the shimmy I have.

So I recently picked up a 2020 wrangler rubicon and have a steering shimmy at highway speeds(video attached). I took a video of play in the track bar on the axle side that I’m thinking is the cause, wondering if you guys think it’s enough play to cause the shimmy I have.

Check every nut and bolt. Probably not the stabilizer. New one will help only masks the problem Steering box was recalled and replaced with a steel one. Check the track bar and ball joints

 

[aeonixx1001]

So I recently picked up a 2020 wrangler rubicon and have a steering shimmy at highway speeds(video attached). I took a video of play in the track bar on the axle side that I’m thinking is the cause, wondering if you guys think it’s enough play to cause the shimmy I have.

I have a 2020 as well and I was experiencing the exact issue. I rebalanced my tires (which you have done). I also replaced the steering dampening shock with a high quality shock. Problem solved. The stock dampener was like a sponge, they are bad from the factory.

 

[Willys41]

Its not the tires or tire balance
The diff is moving side to side
The trac bar is what holds the diff from moving side to side
The trac bar bushings are ether warn or loose
Replace the trac bar with a good adjustable aftermarket used or new
You should also replace the steering stabilizer. The factory ones are junk
Here is a link of a trac bar issue that may be what you are experiencing

 

[501st_legion]

Its not the tires or tire balance
The diff is moving side to side
The trac bar is what holds the diff from moving side to side
The trac bar bushings are ether warn or loose
Replace the trac bar with a good adjustable aftermarket used or new
You should also replace the steering stabilizer. The factory ones are junk
Here is a link of a trac bar issue that may be what you are experiencing

So I put a new track bar on it because I thought the same thing and no change. For now I’m gonna let the dealership replace some stuff on their dime, then I’m gonna be putting a new set of tires on it as well in a couple weeks

 

[Willys41]

What size tires are you running

 

[501st_legion]

What size tires are you running

The stock ko2 33’s

 

[Willys41]

How many miles on the shocks
Dose it feel like when you hit a bump that the wheels is bouncing
I had a situation when going to 35 that my smaller fox shocks could not handle the added tire and wheel wight
Maybe its time to replace the shocks

 

[EVEREADY]

So I recently picked up a 2020 wrangler rubicon and have a steering shimmy at highway speeds(video attached). I took a video of play in the track bar on the axle side that I’m thinking is the cause, wondering if you guys think it’s enough play to cause the shimmy I have.

My first guess would be tires. Have you checked balance?

 

[EVEREADY]

In order to properly check the track bar, you need to look at the axle and frame mount. Re-do your video of both of these mounts but don't turn your tires so much. In the above video, you're inputting too much steering which is causing the tires to turn (as evidenced by your steering stabilizer moving). Only input enough steering left/right to impart a little bit of force into the steering system without actually causing the wheels and tires to move. By doing this, we can accurately see if there's any movement in either of the track bar bushings or mounts. There should be no movement at either of the bushings, bolts, or mounts.

Any time factory tires are replaced with larger than stock size, vehicle should have a new steering alignment to add more positive caster. This is unknown to some front end specialist with a lack of knowledge of off road tires and upgraded sizes. A reputable front end specialist should eliminate the shimmy. IMHO EVEREADY

 

[SoK66]

Have the road wheels been checked for trueness (running on center, and no wobble)? Does it have aftermarket wheels? I've had quite a few like this and one or both wheels are bent or not running on center. A good reason to run quality, hub-centric wheels. Even if the track bar bushings are a bit weak, if the road wheels and tires are running true the issue would be minimal at best.

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