Jeep

Have Jeep questions? Ask a Jeep repair expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a 2007 jeep wrangler with 100 k. From time to time…

Customer Question
I have a 2007 jeep...
I have a 2007 jeep wrangler with 100 k . From time to time when I go over a bump or the entrance on a bridge ramp periodically the front will go into a convulsion like shaking or like I have a flat tire. I have had the Jeep serviced three time for the problem and basically replaced the whole front end. The problem still exists from time to time. When it happens the first instinct is to slow down then when I get over the sudden shock and resume driving its ok again. So right now it is in the garage and they tell me they can't find anything wrong. I think it is a bit dangerous. Can you advise me thanks Ron
Submitted: 2 years ago.Category: Jeep
Show More
Show Less
Ask Your Own Jeep Question
Answered in 1 minute by:
1/25/2016
Jeep Mechanic: eauto, The Car Guy replied 2 years ago
eauto
eauto, The Car Guy
Category: Jeep
Satisfied Customers: 17,484
Experience: ase mechanic 16 Plus years in the field
Verified

is the suspension stock?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
All three shocks were replaced
Jeep Mechanic: eauto, The Car Guy replied 2 years ago

Death Wobble is the shaking that happens when the front end components of your Jeep end up reacting to, or fighting each other - the end result is a violent shaking of the wheel, the Jeep itself shaking like crazy, and you eventually needing new pair of shorts. Death wobble is most commonly seen in Jeeps that have just been lifted, but can also be found in stock Jeeps.

There are two aspects that contribute to make death wobble. First something to begins to wobble, like a tire imbalance or hitting a pothole or bump in the road. The second aspect is generally a loose or worn part that allows the minor wobble to escalate into full-blown death wobble.

Toe-in, caster setting, and tire balance all help contribute to the beginning of a wobble. Loose/worn parts like the front track bar, steering, and control arm bushings contribute to the second phase, when the wobble is exaggerated into the death wobble. If they cant find it take it to a good suspension shop something I worn or loose

Ask Your Own Jeep Question
Customer reply replied 2 years ago
I really appreciate your time. When I first had the trouble I researched and got that answer about death wobble and replaced all parts. The problem still exist is there any thing else you could suggest.It is at the garage and they say they can find anything wrong or can't duplicate the problem
Jeep Mechanic: eauto, The Car Guy replied 2 years ago

all parts what have you replaced?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
the whole front end ball joint shocks, u joints with main torsion bar ( i think that's the name the full bar that goes from wheel to wheel with u joints attached). I haven't got the list right in front of me but most everything I am into for over 4 k
Jeep Mechanic: eauto, The Car Guy replied 2 years ago

did they replace every tie rod and the steering stabilizer?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
as far as I know they did . They did the wheel aliment and it showed to be good
Jeep Mechanic: eauto, The Car Guy replied 2 years ago

a slightly loose front end part or worn steering stabilizer is generally the culprit. I strongly suggest another shop double checking the steering linkage..the shop is missing something

Ask Your Own Jeep Question
Jeep Mechanic: eauto, The Car Guy replied 2 years ago

First, the tie rod (green) has ends that attach to a knuckle on each side. As you could imagine, if either ends of the tie rod were broken or bad, that could be a culprit for a shimmy (not Death Wobble). A common place to damage the tie rod is on the driver's side at the adjusting sleeve (in the picture, just to the right of the red swaybar link). That sleeve (maybe not the correct term for it, but you can see what I am talking about) allows the width of the tie rod to be expanded or contracted. There are threads on that end that can be damaged, causing play on that driver's side and allow an up and down, or circular play movement. Again, this would cause a shimmy, not Death Wobble.

Next, look at the drag lin (purple). On one end, it attaches to the pitman arm (lavender), that attaches to the steering gear box. On the other end, the drag link attaches to the passenger side knuckle. When you turn your steering wheel, a shaft turns that goes to the steering gear box. The steering gear box turns the pitman arm, and the pitman arm pushes or pulls the drag link, which pushes or pulls the knuckle. Your steering wheel is straitened by loosening the two nuts on the sleeve/turnbuckle on the drag link and rotating the sleeve/turnbuckle to lengthen or contract the length of the drag link. If either end of the drag link is damaged, this would cause a wobble or shimmy, but not Death Wobble.

Next, look at the trackbar (aqua). It attaches to a bracket on the frame on the driver's side and to the axle on the passenger side. The purpose of the trackbar is to center the axle on the frame. With the axle centered on the frame, it provides some resistance to the steering system to allow you to turn. If there was no trackbar and you turned the steering, the whole front frame would shift. As a result, there is significant force applied to the trackbar in driving and steering.

Now, imagine that the bolts that hold the trackbar are loose in their bolt holes, or that the bolt holes are wallowed out (oval), or that the bushings at the trackbar ends are damaged, or that the bracket at the axle side has come loose because the weld has broken, or that the bushings are all twisted up because the rig has been lifted without the installer loosening the bolts and then retightened them at the new ride height. All these things would allow play in the front trackbar. When you steer or go around a corner, these loose or broken things would allow the axle to shake or slide side to side. If you hit a bump in the road, it could knock the trackbar towards the driver's side. Then, the rest of the suspension (springs, etc.) would try to bring the trackbar back to the passenger side. If you were going at any sort of speed, you could develop a kind of harmonic resonance as the axle more and more violently slide/rocked/shaked from side to side. It would feel like your whole front end was being voilently torn apart. You would have to bring your vehicle to a complete standstill to stop the harmonic resonance. This is Death Wobble.

Even one incident of violent Death Wobble related to the front trackbar can cause significant damage. The voilent harmonic resonance of the back and forth shaking is more than the trackbar bushings, bolt holes, and brackets are designed to handle. A severe Death Wobble occurance can crack or break the welds on the axle side trackbar bracket, or the bolt can wallow out the bolt hole in the bracket, or the bushing can be permanently damaged.

This is the most common source of Death Wobble because inexperienced installers either do not remove the bolt from the trackbar when they install a lift--leaving the bushing pinched in the bracket and bound up, or they do not properly torque the bolts after the lift has been installed with the tires on and the full weight of the vehicle on the ground at ride height, or (maybe the most common) they do not retorque the trackbar bolts after the first 50 miles, after every heavy wheeling trip, and at every oil change interval.

Next, look at the lower control arms (purple) and the upper control arms (light blue). In the picture, they are aftermarket arms with a heim joint on one end. However, the stock control arms have a rubber bushing at each end. When the control arms are properly torqued, the bushing is somewhat pinched in the mounting brackets on the axle and the frame. Sometimes, an installer will make the mistake of not loosening the bolts for the control arms when they install a lift. What happens sometimes is they really bind up the bushings because they are pinched/sandwiched at stock ride height, but then forced to the new lifted ride height. These bound up bushings can cause weird handling, bushing failure, and lead to Death Wobble. The proper way is to loosen the bolts, install the lift, reinstall the wheels so the suspension and jeep are at the new ride height, rock the vehicle/suspension back and forth and side to side, then re-torque the bolts to spec, then after 50 miles re-torque them to spec, then after every oil change or very heavy wheeling trip re-torque them to spec.

Improperly balanced tires, too much air in tires, bent wheels, improperly installed wheel spacers, bad tires(with separated plys), and poor alignment specs (caster, camber, and not enough toe-in) can cause wobbles and shimmies that lead to Death Wobble. However, these precipitate Death Wobble, but they are not the cause of Death Wobble.
Although not specifically identified in the picture, the ball joints that are at the top and bottom of each knuckle where it attaches to the axle C can go bad. Bad ball joints can cause shimmies, wobbles, but usually not full on Death Wobble.

Next, allthough not identified in the picture, the unit bearings can go bad and be a cause of shimmy and wobble, but not Death Wobble.

Hope this helps--assuming you read it all.

Death Wobble is no mystery.

The reason that the steering stabilizer masks it is that it can absorb some of the side to side voilent harmonics of a loose trackbar or damaged mounts. However, this masking is dangerous because it will not prevent the eventual failure of trackbar bracket welds and bolt holes from trackbar Death Wobble.

It is extremely important to immediately diagnose and fix Death Wobble.

Even one episode of DW can damage other components.

Multiple episodes of DW are almost guaranteed to damage other components.

Multiple episodes will often damage your:

  • ball joint
    • tie rod ends--including the adjusting sleeve end on the driver side
      • trackbar bushings
        • trackbar bracket bolt holes
          • steering sector shaft (where the pitman arm attaches to the steering box)
            • steering stabilizer
              • front lower control arm bracket bolt holes
                • unit bearings
                  • trackbar bracket welds
                    • drag link ends
                    Hellbound13 is an example of a member who with 5-6 episodes of trackbar related DW on a stock jeep ended up "chasing his tail" for many, many months. He ended up replacing almost everything in the above list--sometimes more than once.

                    Without repairing/replacing everything
Ask Your Own Jeep Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a jeep mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask eauto Your Own Question
eauto
eauto
eauto, The Car Guy
Category: Jeep
Satisfied Customers: 17,484
17,484 Satisfied Customers
Experience: ase mechanic 16 Plus years in the field

eauto is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Thank you so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor.

Lynn B.Ormond Beach, FL

I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat.

StanSayre, PA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Chris

Chris

Shop Foreman

3,578 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,649 satisfied customers

Jeep factory training........25 years in the industry.

Dave

Dave

Jeep Master Tech

1,149 satisfied customers

Chrysler Triple Master, ASE master Tech AA degree in Auto.

moparfl

moparfl

ASE Certified Technician

1,130 satisfied customers

ASE Master Tech Chrysler Dodge Jeep Master Tech

Tim Mohr

Tim Mohr

ASE MASTER TECH

1,052 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Ron Z.

Ron Z.

- Jeep Tech -

641 satisfied customers

18+yrs experience. State Inspector & Jeep Diagnostics/Repair

jeepmopar76

jeepmopar76

Jeep/Chrysler Triple Master Tech

579 satisfied customers

32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle

< Previous | Next >

Related Jeep Questions
05 Wrangler 4.0L front-end shakes uncontrollably when I t
05 Wrangler 4.0L front-end shakes uncontrollably when I hit bumps or stop from a fast speed, please advise.… read more
camerontech
camerontech
20 year experience diagnostic technician
class a
673 satisfied customers
2002 Wrangler Sport: 2nd gear..3rd gear..front end vibrates like crazy
Good Morning, I have a 2002 Wrangler Sport in which I have a issue with. I have a major problem going from 2nd gear and through 3rd gear. The front end vibrates like crazy. (It sounds and feels as if … read more
jeepmopar76
jeepmopar76
Jeep/Chrysler Triple Master Tech
Vocational, Technical or Trade Sc
579 satisfied customers
2007 Jeep Wrangler Unlimited: shakes..balanced..front end checked
I have a 2007 Jeep Wrangler Unlimited. It shakes uncontrollable going over a bridge or coming off an overpass or when showing down. I have had the tires rotated and balanced and the front end checked.… read more
Kennyb28
Kennyb28
Service Manager
High School Diploma, some college,
327 satisfied customers
2006 Jeep Wrangler Unlimited: the steering wheel and front end
I have a 2006 Jeep Wrangler Unlimited, almost 25,000 miles on it. I was driving on the interstate going about 65 mph when the steering wheel and front end starting shaking and making noise. I pulled o… read more
Matt Hardy
Matt Hardy
Master Auto Repair Technician
Associate Degree
605 satisfied customers
My 2006..mi..freeway the steering wheel started to shake
My 2006 TJ has 34000 mi. Yesterday for the first time I was driving 65 MPH and after going over an expansion joint on the freeway the steering wheel started to shake violently and would not stop until… read more
CDJMasterTech
CDJMasterTech
Lead Automotive Technician
High School or GED
813 satisfied customers
2007 Wrangler Rubicon: front wheels..service bulletin..highway speed
2007 Wrangler Rubicon hit bumps at speed and front wheels shake - followed a service bulletin to correct. Now less shake less often but still dangerous at highway speed. What can be done… read more
jeepmopar76
jeepmopar76
Jeep/Chrysler Triple Master Tech
Vocational, Technical or Trade Sc
579 satisfied customers
very violent shake from my steering wheel..highway..high speed
In the last month, I have been getting a very violent shake from my steering wheel when I hit bumps from time to time (normal driving highway conditions). It almost feels like driving over giant rumpl… read more
ricardo hohl
ricardo hohl
automotive instructor
Associate Degree
1,818 satisfied customers
Jeep: I hit bumps or pot holes I have a woble in the steering wheel
on my jeep, when I hit bumps or pot holes I have a woble in the steering wheel. Is there a way to tighten that up… read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
1,522 satisfied customers
2000 wrangler: that has front-end vibration..speeds..slow down
I have a 2000 wrangler that has front-end vibration. It usually shos up around 55-60mph, not present at other speeds. Also it is dangerously bad if I hit a bump at almost any speed, but will disappear… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1998 jeep wrangler: good bump..left turn..right front wheel..shakes
I Have a 1998 jeep wrangler. when I hit a good bump or a sharp left turn the right front wheel sometimes shakes fairly violently for a second or two. When I let up on the gas it staops. What causes th… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
Wrangler: high speed ( 60+) on highways the front end..bump..bouncing
I have a 2007 4 door wrangler. On 3 occassions recently at high speed ( 60+) on highways the front end has bounced uncontrollably when I hit a bump in the road. You essentially lose control and have t… read more
Mr. T
Mr. T
Mechanic
Vocational, Technical or Trade Scho
144 satisfied customers
1997 Jeep Grand Cherokee Limited: 150K Miles..Steering wheel..bump
1997 Jeep Grand Cherokee Limited-over 150K Miles. Steering wheel shakes uncontrollably after hitting a bump. Noticably more on right side. I have replaced gear box, rotors, new tires, tires rotated an… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
jeep: bump..shakes..complete stop..all the tires balanced and it still
when i hit a bump my wholl jeep shakes bad i have to come to almost a complete stop to stop the shaking i have had all the tires balanced and it still shakesa… read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
1,522 satisfied customers
2007 Jeep Wrangler Unlimited: real bad..shifter..front end..stopping
within the last week our 2007 Jeep Wrangler Unlimited, twice started shaking real bad at about 30-35mph. first we noticed the shifter started shaking then the whole front end started shaking out of co… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
2008 Jeep Wrangler: violently..it hits a bunch of bumps
My 2008 Jeep Wrangler just started shaking violently when it hits a bunch of bumps. What could this problem be. I have only had the car for one year brand new. The shaking of the wheels feels like a f… read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
1,522 satisfied customers
Wrangler s: 000 miles..the front end will shake after going over bump
I just bought a Wrangler Jk, 2007 with 30,000 miles from dealer... All of a sudden the front end will shake after going over bump when I"m in a turn.... Had the same issue in an 2002 wrangler 2 door m… read more
Mark
Mark
22 Year Factory trained technician
Vocational, Technical or Trade Scho
2,649 satisfied customers
Jeep Wrangler: occasionally..bump..ve tightened the lug nuts..joints
Hi! I occasionally have problems with the rear of my ''99 Jeep Wrangler shaking when I hit a bump. I''ve tightened the lug nuts, checked the U joints...any suggestions?… read more
bill
bill
chrysler dodge jeep tech
Vocational, Technical or Trade Scho
458 satisfied customers
Jeep wrangler: every once..a bump around 5o mph..complete stop
I have a 2007 4-door jeep wrangler and every once in a while when I drive over a bump around 5o mph the jeep starts shaking from left to right and the only way to stop the shaking is to come to a comp… read more
Dodge tech 1
Dodge tech 1
Diesel Technician, Drivability Technicia
Vocational, Technical or Trade Scho
122 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x