Is the death wobble/steering issues the most common thread?

[Wobelnik]

I have a new to me 2018 Rubicon Unlimited JL. Experienced the death wobble. I had the Synergy steering bracket (135,000 mi. out of warranty) installed to steering box. I also added a steering stabalizer and balanced tires along with a rotation. Still experienceing loose steering wheel and a fair ammount of wondering. No death wobble yet. I read that wondering is a Jeep thing and it is to be excepted. No worn front end parts that I am aware of. What would be my next move in order to tighten her up a bit, or should I just except her the way she is, a wondering loosy goosy Jeep?

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[munkeymike]

Check if your steering box is the aluminum or steel one. It should be aluminum unless previous owner did the swap under warranty. If it is the aluminum one, I had some success with tightening the steering box.

 

[Wobelnik]

Check if your steering box is the aluminum or steel one. It should be aluminum unless previous owner did the swap under warranty. If it is the aluminum one, I had some success with tightening the steering box.

It's alluminium, thats the reason for the synergy bracket install. Better now but would like some improvement ideas to tighten the loose wobbly steering.

 

[munkeymike]

It's alluminium, thats the reason for the synergy bracket install. Better now but would like some improvement ideas to tighten the loose wobbly steering.

You can adjust/tighten the steering box. It's a little screw on top of it. There's videos on YouTube on how to do it properly.

 

[kah.mun.rah]

A loose track bar connection is one of the primary culprits.

I would never adjust the steering box screw no matter what YouTube says. Screwing up your steering box could lead to a lot bigger consequences than death wobble.

 

[munkeymike]

A loose track bar connections is one of the primary culprits.

I would never adjust the steering box screw no matter what YouTube says. Screwing up your steering box could lead to a lot bigger consequences than death wobble.

OP says he already checked for worn/loose components. The steering box has an adjustment screw literally built in so that it can be adjusted. If you don't feel confident enough to do it yourself, take it to a mechanic.

 

[LazyJL]

It's very easy to overtightern the adjustment screw and damage or destroy the steering box. It's best to leave it to experienced hands.

 

[VKSheridan]

Jorge, adjusting the worm gear (aka steering box) will alter the free play between the steering wheel and the pitman arm at the steer box but that’s it. It will not stop heavy tires from trying to have their own ping pong match going down the highway.

You can weld the pitman arm to the frame and totally eliminate the steering box and still have death wobble from loose ball joints. Death wobble comes from one wheel bitching slapping the other through the tie rod and then the other slapping right back. It’s a game of mass as to who controls who and the more mass you add to your front end, the less successful your steering components will be in controlling it.

To weaken the punches, OEM’s install dampeners and stock dampeners can barely contain stock wheel forces. They struggle if you add weight like bigger tires, a beefy tie rod and a huge steel bumper over them. Throw in some wear and the slightest pothole can start the ping pong match between the wheels.

You have a 7 year old vehicle that’s bound to have wear with a solid front axle.

My feedback is to replace the steering dampener with a stronger aftermarket one and verify your ball joints and kingpins have no slop. The more slop between the wheels and drag link, the more energy the dampener must dampen.

 

[Wobelnik]

Thanks, good explanation. Just got back from wheel allingment shop with a very knowlable Jeep mechanic. He said and showed me that all front end parts looked good but allingment was off in front and rear. He recomended installing front and rear trackbars then doing allingment. He will then be able to dial in the suspension much better. Does this sound right? It makes sence to me based all the other posts I've read.

 

[Wobelnik]

Jorge, adjusting the worm gear (aka steering box) will alter the free play between the steering wheel and the pitman arm at the steer box but that’s it. It will not stop heavy tires from trying to have their own ping pong match going down the highway.

You can weld the pitman arm to the frame and totally eliminate the steering box and still have death wobble from loose ball joints. Death wobble comes from one wheel bitching slapping the other through the tie rod and then the other slapping right back. It’s a game of mass as to who controls who and the more mass you add to your front end, the less successful your steering components will be in controlling it.

To weaken the punches, OEM’s install dampeners and stock dampeners can barely contain stock wheel forces. They struggle if you add weight like bigger tires, a beefy tie rod and a huge steel bumper over them. Throw in some wear and the slightest pothole can start the ping pong match between the wheels.

You have a 7 year old vehicle that’s bound to have wear with a solid front axle.

My feedback is to replace the steering dampener with a stronger aftermarket one and verify your ball joints and kingpins have no slop. The more slop between the wheels and drag link, the more energy the dampener must dampen.

As explained below, all looks good and tight. Any recomendations on a good set of track bars for front and rear?

 

[Upnarms]

To answer the thread title, yes! And everything you need to know has already been written multiple times. That being said there can be tons of causes. I think the factory steering is crap anyway so I replaced everything drag link tie rod, ends, track bar, stabilizer added the sector shaft brace all the goodies. No more complaints. But if you are just trying to find the one culprit, then you have some work ahead of you.

Personally I would start by replacing the factory track bar with a beefy one. The factory one is barely sufficient and whether or not it "shows", those bushings are long gone.

How many miles on your tires and what kind?

Also if you replaced the steering stabilizer with another factory one, id recommend a through shaft one. Will feel much stiffer.

Drag link, tierod ends, and check ball joints

But yeah the steering is indeed flighty in the jl even when new

 

[Wobelnik]

Thanks, man. I just purchased front and rear adjustable track bars from JKS. Are they beefy enough for light trails and beach? That's all my budget would allow. Did the steering box bracket plus a stabilizer. Taking baby steps to fine tune the suspension/steering. I hope I'm the right track.
Thank for the help.

 

[Wbino]

To answer the thread title, yes! And everything you need to know has already been written multiple times. That being said there can be tons of causes. I think the factory steering is crap anyway so I replaced everything drag link tie rod, ends, track bar, stabilizer added the sector shaft brace all the goodies. No more complaints. But if you are just trying to find the one culprit, then you have some work ahead of you.

Personally I would start by replacing the factory track bar with a beefy one. The factory one is barely sufficient and whether or not it "shows", those bushings are long gone.

How many miles on your tires and what kind?

Also if you replaced the steering stabilizer with another factory one, id recommend a through shaft one. Will feel much stiffer.

Drag link, tierod ends, and check ball joints

But yeah the steering is indeed flighty in the jl even when new

That not my experience steering is rock solid on my 2021.

 

[kah.mun.rah]

OP says he already checked for worn/loose components. The steering box has an adjustment screw literally built in so that it can be adjusted. If you don't feel confident enough to do it yourself, take it to a mechanic.

I can guarantee that a reputable mechanic is not going to touch that screw.

 

[kah.mun.rah]

As explained below, all looks good and tight. Any recomendations on a good set of track bars for front and rear?

A Yeti is quality beef:

https://www.northridge4x4.com/part/...eer-smarts-yeti-xd-front-adjustable-track-bar

https://www.northridge4x4.com/part/...-smarts-yeti-xd-adjustable-rear-track-bar-red

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