death wobble with a 99 tj sport
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Re: Re: death wobble with a 99 tj sport
On Fri, 06 Jul 2007 12:34:41 -0400, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mike Romain wrote:
>> Jamie Mello wrote:
>>> I have a 99 tj sport with a 5 speed stick shift with a 2.5 spacer lift
>>> and keep getting the death wobble almost every day for about 2 weeks
>>> now and it is getting old the death wobble comes at about 45 to 50 mph
>>> after I go over a bump and it comes some times when on the highway
>>> going about 45 + when you turn only right but very rarely it will
>>> happen when you turn left so any help will very munch helpful.
>>>
>>
>> I would be checking out the track bar or it's relocating bracket
>> thinking it has come loose or it's bushings are broke. The track bar
>> has a tie rod end on it too that can go bad.
>>
>> Something is likely loose though.
>
>Finally got around to replacing my steering dampener. It hasn't wobbled
>since I got a new set of BFG KO's. The old SD was completely shot. Now
>the steering wheel doesn't shake a few times over bumps like it used to.
>
>Now for some track bar bushings to stop the clunk over bumps.
>
>And, it seems it's not a crackhead in the 'hood. It's juveniles! Chased a
>couple girls from the tennis courts last night that were trying to break
>things. A quick drive around the 'hood found a bunch of juvies lighting
>fireworks. Next time they show up, there won't be anything to steal except
>a dead lighter with "ha ha, f*cker" written on it! Bastards!!!
The "Death Wooble" is caused by a dynamically unstable front axle.
Many think is is because a a bad stabilizer or worn suspension
componates but all they are doing is letting you know that you front
end is unstable to begin with and that you are trying to brute force
hold it stable. This instablity is cause by the improper caster,
camber and toe in combo for your lift and tires. Many think that
alignment is same but it is not and factory specs are rarely okay with
you add a lift and more tire rolling resistance and tread width to the
combo. Usually when you lift it you do not set proper posistive caster
angle (the amount that top of axle pivots are tipped towards rear of
vehicle) and this results in a front axle that want to osciilate at
times. A new damper is just masking the real problem but many are
usually convinced otherwise. Dynamic instablity is good for a fighter
aircraft because it makes it more resposive to controls but it is not
good for a front axle.
-----------------
TheSnoMan.com
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mike Romain wrote:
>> Jamie Mello wrote:
>>> I have a 99 tj sport with a 5 speed stick shift with a 2.5 spacer lift
>>> and keep getting the death wobble almost every day for about 2 weeks
>>> now and it is getting old the death wobble comes at about 45 to 50 mph
>>> after I go over a bump and it comes some times when on the highway
>>> going about 45 + when you turn only right but very rarely it will
>>> happen when you turn left so any help will very munch helpful.
>>>
>>
>> I would be checking out the track bar or it's relocating bracket
>> thinking it has come loose or it's bushings are broke. The track bar
>> has a tie rod end on it too that can go bad.
>>
>> Something is likely loose though.
>
>Finally got around to replacing my steering dampener. It hasn't wobbled
>since I got a new set of BFG KO's. The old SD was completely shot. Now
>the steering wheel doesn't shake a few times over bumps like it used to.
>
>Now for some track bar bushings to stop the clunk over bumps.
>
>And, it seems it's not a crackhead in the 'hood. It's juveniles! Chased a
>couple girls from the tennis courts last night that were trying to break
>things. A quick drive around the 'hood found a bunch of juvies lighting
>fireworks. Next time they show up, there won't be anything to steal except
>a dead lighter with "ha ha, f*cker" written on it! Bastards!!!
The "Death Wooble" is caused by a dynamically unstable front axle.
Many think is is because a a bad stabilizer or worn suspension
componates but all they are doing is letting you know that you front
end is unstable to begin with and that you are trying to brute force
hold it stable. This instablity is cause by the improper caster,
camber and toe in combo for your lift and tires. Many think that
alignment is same but it is not and factory specs are rarely okay with
you add a lift and more tire rolling resistance and tread width to the
combo. Usually when you lift it you do not set proper posistive caster
angle (the amount that top of axle pivots are tipped towards rear of
vehicle) and this results in a front axle that want to osciilate at
times. A new damper is just masking the real problem but many are
usually convinced otherwise. Dynamic instablity is good for a fighter
aircraft because it makes it more resposive to controls but it is not
good for a front axle.
-----------------
TheSnoMan.com
Guest
Posts: n/a
Re: Re: death wobble with a 99 tj sport
On Fri, 06 Jul 2007 15:39:24 -0400, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
Guest
Posts: n/a
Re: Re: death wobble with a 99 tj sport
On Fri, 06 Jul 2007 15:39:24 -0400, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
Guest
Posts: n/a
Re: Re: death wobble with a 99 tj sport
On Fri, 06 Jul 2007 15:39:24 -0400, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
Guest
Posts: n/a
Re: Re: death wobble with a 99 tj sport
On Fri, 06 Jul 2007 15:39:24 -0400, Scott in Baltimore
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com
<sDcOoNtTtS_PuAnMiMtE_69@yahoo.com> wrote:
>Mine is not lifted. I did replace the P205/75R15's with LT235/75R15's years ago.
>My track bar bushings are shot and need replacement. I'll get to that, soon.
>
>-Scott
>'97 TJ SE
I used to align those axles many years ago when few even knew what a
4x4 was let alone how to align one. I have seen many death wooble
cases that I was able to fix. With leaf springs it was easy to set
caster with shims but newer front ends are not so easy sometimes (4
link solid axle and such) For camber you used to bend the housing
with a specail 25 ton clamp jack (very carefully too) before they
started to use shims behind spindles where they mounted to knuckle. I
have mixed feelings about those shims.
-----------------
TheSnoMan.com