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Old 05-31-2008, 11:20 PM   #1
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death wobble?

ok any ideas why this would be happening
when i have two passengers and i curve towards the left going batween 25-40 with the jeep in gear, the front end shakes violently and the steering wheel does 1/8 turns form side to side on its own

the only things i can think of is 1. low tire pressure(ill check in morning)
2. needs to be aligned (check in morning as well)
3.death wobble maybe sine 6" of lift and 1" T case drop
4. rotated my tires four weeks ago so maybe still wearing in
5. tires need to be balanced

any ideas would be helpful,
again im fine with it just me, but once i have added weight, especially in back, it does it!

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Old 06-01-2008, 12:51 AM   #2
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i'm guessing its your caster angle. 6" of lift is alot and your front arms may not be adjusted properly for the correct angle. Adding weight to the back makes the front lift enough to hit that magic "bad caster angle" spot. Thats my guess. could be anything from worn bushings to bad alignment. Tackle the list you have and you'll get to the root of the problem eventually.

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Old 06-01-2008, 09:19 AM   #3
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almost definately not balance, put that at the end of the list. you're on the right track
also check front end for loose parts, tie rod ends, ball joints, and check u joints. not likely, but is it stuck in 4wd?

did you change anything right before it happened?
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Old 06-01-2008, 10:17 AM   #4
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it has only started after i rotated my tires which is why i suspect tire pressure or balance, im gonna go check in a few minutes
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Old 06-01-2008, 10:35 AM   #5
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so tire pressure is fine, and ive gotta wait for my dad to check the alignment,
also btw its only 4" of susp lift
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Old 06-01-2008, 12:30 PM   #6
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ok so its toed in 1/8 of an inch so thats ok right?

next step i guesst aking it in to make sure the tires are balanced??
or how do i check caster angle and why would it do it only on left turns?
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Old 06-01-2008, 04:51 PM   #7
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so i talked to my grandpa who used to be a mechanic, he advised jacking the front end up, undo the lug nuts on the tires and redoing then to make sure they are seated correctly and tight, lowering the air pressure in back and raising it in front like it was b4, since i never took the time to let air out of the tires that i rotated to the back, only fill up the ones in front
and also while the front end is up, make sure there is no play in the wheel bearings or anything else that would allow the tires to start to shake

anything else i should do when i have the front end jacked up/ tires loosened? im gonna do that tomorrow
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Old 06-01-2008, 07:47 PM   #8
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Maybe try rotating the tires back to where they were. If that cures it, you know it is a wheel/tire issue
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Old 06-01-2008, 08:13 PM   #9
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What is your caster angle? Do you have adjustible ca's? If not even if that isn't the prob I would recamend getting some in the future.
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Old 06-01-2008, 08:20 PM   #10
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how can i figure out my caster angle?
and no they aren't adjustable

and i plan to see if this stuff works tomorrow and if not then on tuesday rotate them back
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Old 06-01-2008, 08:27 PM   #11
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With a angle gauge,
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Old 06-01-2008, 08:46 PM   #12
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and put that on the lower CA's?
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Old 06-02-2008, 07:00 AM   #13
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Sounds exactly like death wobble. Your Grandfather may have a point, maybe one of your front tires didn't get torqued down all the way or you have a few loose lugs.

Have a buddy turn the steering back and forth while you eye ball the front end. Check for excessive play on the ball joints and track bar.
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Old 06-02-2008, 08:22 AM   #14
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Quote:
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Maybe try rotating the tires back to where they were. If that cures it, you know it is a wheel/tire issue
x 1 million. rotate them back, since that's what seemed to change things. if it goes away, then you can stop beating your head, and check those two tires. always go to what just changed first.
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Old 06-02-2008, 04:22 PM   #15
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so i did the easier thing first. I un did the lug nuts and tightened them back up to make sure the wheels were seated properly and they were all tight.
However i broke a friggen stud, I have wheel spacers so it will be easier to replace, but i think that the problem was probably that the wheel was not seated correctly and when a little bit of weight came off of it (left turns going fast enough to throw the weight to the other side) that it started to shimmy or something. This stressed out that stud and led to me breaking it by hand and im not that strong, i embarssingly bench only 120 (im 175 and play hockey and lax and 17!)

So I gotta find some air tools and take off the spacer and find out what I need for a stud for that. Then retighten on that wheel and hopefully it was just that the wheel wasn't seated properly.

or it could have just broke from stress form the wobble and it came from somewhere else, but the first order of business is now to get another stud!
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Old 06-02-2008, 04:29 PM   #16
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spacers are a bad idea in my opinion. and if you broke a lug taking it off, chances are the lug was installed wrong. just my $.02

not trying to piss ya off if you did it yourself, but just what usually the case is. i'd say lose the spacers, get the right wheels. but i know we can't always afford the right thing right away.

let us know how it goes
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Old 06-02-2008, 04:51 PM   #17
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i broke it putting it on, not off, but the thing is i had my dad tighten them last time and he didn't break it off and now when i do it after the wobble it breaks which makes me suspicious.

The spacers are also 11 years old so idk if age has anything to do with it becoming weaker

but im gonna take it to his shop and take the spacer off and go to napa and get a stud and put it in and then ill have fixed that problem, im just hoping it makes everything go away if its seated correctly this time!
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Old 06-02-2008, 05:00 PM   #18
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i broke it putting it on, not off, but the thing is i had my dad tighten them last time and he didn't break it off and now when i do it after the wobble it breaks which makes me suspicious.

The spacers are also 11 years old so idk if age has anything to do with it becoming weaker

but im gonna take it to his shop and take the spacer off and go to napa and get a stud and put it in and then ill have fixed that problem, im just hoping it makes everything go away if its seated correctly this time!
As cheap as studs are you ought to do them all and not have to deal with this again.
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Old 06-02-2008, 05:47 PM   #19
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yeah thats probably a good idea!
especially since ill have the use of air tools!

anyone know anything about studs btw, ive looked and there are screw ins and press ins, do i just get what my spacers have now and how can i tell which ones which ones and how do i get the press in ones out

thanks
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Old 06-02-2008, 05:53 PM   #20
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the press in ones simpley beat out with a hammer, there is a great little tool for installing them that is very cheap, its just a tapered spacer with a bearing in it. or use some washers and run it in with the lug nut. i'd get new lug nuts to.
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Old 06-03-2008, 10:42 AM   #21
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yeah thats probably a good idea!
especially since ill have the use of air tools!

anyone know anything about studs btw, ive looked and there are screw ins and press ins, do i just get what my spacers have now and how can i tell which ones which ones and how do i get the press in ones out

thanks
I think you're suspicions are spot on...the wobble most lilely stressed your lugs.

IMO - Change the front lugs and ditch the spacers.
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Old 06-03-2008, 05:38 PM   #22
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gotta keep them for now, but im gonna change out al the studs on saturday
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Old 06-06-2008, 09:31 PM   #23
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ok so tomorrow we're re doing all the studs, and then testing it will the wheels seated properly, and if that doesnt solve it we're switching the tires back, and then if that doesnt solve it im gonna give up and take it to someone

btw it starts only when i hit a bump while going on a left turn while at 35-45 mph, not sure if the bump part changes or helps me in teh diagnosis?
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Old 06-07-2008, 08:14 AM   #24
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A good trick to get the wheel studs back in is to them started with a hammer and then put alot of washers on the other side followed by the lug nut then hit it with the impact gun. If done right it will draw them right in. Also when putting the wheels on tighten them to about 90 foot pounds is good and do it in a star pattern.
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Old 06-08-2008, 12:03 AM   #25
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yeah we used a hydraulic arbour press to seat them, and tightened them to 100ft/lbs in a start patter and in still have the wobble, and it seems to be getting worse and worse, tomorrow we're gonna re rotate the tires, then if no one on here has any idea we're gonna take it to a shop and see if they can find anyhting
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Old 06-08-2008, 10:24 AM   #26
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Is your track bar tight?
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Old 06-08-2008, 03:31 PM   #27
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Is your track bar tight?
x2 That track bar seems to be a real bitch when it comes to DW.
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Old 06-08-2008, 05:15 PM   #28
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ok so it shook worse than before after we reseated the tires and put the stud back on, so we decided to un rotate the tires and guess what its G-O-N-E, so tuesday my dad is taking it to work and dropping it off to get the tires balanced and while they're off have them rotate them, hopefully that'll fix the problem since it was perfectly fine once we rotated them back
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Old 06-21-2008, 03:51 PM   #29
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would missing a lug from each wheel cause the wobble?
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Old 08-22-2008, 02:06 PM   #30
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My wife has a 2005 TJ and had the same problem, replaced the steering stablizer twice, balanced the tires twice, had the tires shaved and trued, had front end aligned twice....still had the problem. All this at three different shops! Found a Mech at the steelership that said Jeep was having problems with the belts seperating on Goodyear wrangler tires, replaced with Duellers over a year ago, haven't had a problem since.

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