Hey, guys. I have a pretty serious vibration in my jeep when i am
between 55 and 65 mph. When it first started happening, i got a tire
rotation and balance, and that took care of the problem. Six months
later, the vibration started again, rather small this time, but i
still got another rotation and balance, and now the vibration is
really bad. What could this be from?

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"JeepFan" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_581742_856900ca9787e7af1272cf7dea79a3b0@autoforumz.com...
> Hey, guys. I have a pretty serious vibration in my jeep when i am
> between 55 and 65 mph. When it first started happening, i got a tire
> rotation and balance, and that took care of the problem. Six months
> later, the vibration started again, rather small this time, but i
> still got another rotation and balance, and now the vibration is
> really bad. What could this be from?

A defective tire? I once had a car vibrate like crazy with a blister/bubble
in the tread. Also make sure the wheels and mounts aren't warped. A wheel
may not be seating properly in one position?


-John

"Generic" wrote:
> "JeepFan" <UseLinkToEmail@AutoForumz.com> wrote in message
> news:1_581742_856900ca9787e7af1272cf7dea79a3b0@autoforumz.com...
> > Hey, guys. I have a pretty serious vibration in my jeep
> when i am
> > between 55 and 65 mph. When it first started happening, i
> got a tire
> > rotation and balance, and that took care of the problem.
> Six months
> > later, the vibration started again, rather small this time,
> but i
> > still got another rotation and balance, and now the
> vibration is
> > really bad. What could this be from?
>
> A defective tire? I once had a car vibrate like crazy with a
> blister/bubble
> in the tread. Also make sure the wheels and mounts aren't
> warped. A wheel
> may not be seating properly in one position?
>
>
> -John

Thanks for the tip. Any other thoughts? Why would it only be in that
speed? It stops once you get past 65mph...

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JeepFan wrote:
>
> "Generic" wrote:
> > "JeepFan" <UseLinkToEmail@AutoForumz.com> wrote in message
> > news:1_581742_856900ca9787e7af1272cf7dea79a3b0@autoforumz.com...
> > > Hey, guys. I have a pretty serious vibration in my jeep
> > when i am
> > > between 55 and 65 mph. When it first started happening, i
> > got a tire
> > > rotation and balance, and that took care of the problem.
> > Six months
> > > later, the vibration started again, rather small this time,
> > but i
> > > still got another rotation and balance, and now the
> > vibration is
> > > really bad. What could this be from?
> >
> > A defective tire? I once had a car vibrate like crazy with a
> > blister/bubble
> > in the tread. Also make sure the wheels and mounts aren't
> > warped. A wheel
> > may not be seating properly in one position?
> >
> >
> > -John
>
> Thanks for the tip. Any other thoughts? Why would it only be in that
> speed? It stops once you get past 65mph...
>

That is usually about the speed where the tires go from being compressed
on the road to getting rounder from centripetal force. If there is any
defect in the tire, that is the point where it usually shows up.

By moving the bad tire to the back, you got some more life out of it
before it became bad back there too. Now up front again, it is really
telling you it's dead.

If it was just a matter of throwing a weight or a bent rim, then
balancing would have fixed it and it wouldn't be getting worse.

I'll bet if you jack up each front corner and spin the tire, you will
see one with a high spot.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"Mike Romain" wrote:
> JeepFan wrote:
> >
> > "Generic" wrote:
> &nbsp;> > "JeepFan" &lt;UseLinkToEmail@AutoForumz.com&gt;
> wrote in message
> &nbsp;> >
> news:1_581742_856900ca9787e7af1272cf7dea79a3b0@autoforumz.com...
> &nbsp;&nbsp;> > > Hey, guys. I have a pretty serious
> vibration in my jeep
> &nbsp;> > when i am
> &nbsp;&nbsp;> > > between 55 and 65 mph. When it first
> started happening, i
> &nbsp;> > got a tire
> &nbsp;&nbsp;> > > rotation and balance, and that took care of
> the problem.
> &nbsp;> > Six months
> &nbsp;&nbsp;> > > later, the vibration started again, rather
> small this time,
> &nbsp;> > but i
> &nbsp;&nbsp;> > > still got another rotation and balance, and
> now the
> &nbsp;> > vibration is
> &nbsp;&nbsp;> > > really bad. What could this be from?
> &nbsp;> >
> &nbsp;> > A defective tire? I once had a car vibrate like
> crazy with a
> &nbsp;> > blister/bubble
> &nbsp;> > in the tread. Also make sure the wheels and mounts
> aren't
> &nbsp;> > warped. A wheel
> &nbsp;> > may not be seating properly in one position?
> &nbsp;> >
> &nbsp;> >
> &nbsp;> > -John
> >
> > Thanks for the tip. Any other thoughts? Why would it only
> be in that
> > speed? It stops once you get past 65mph...
> >
>
> That is usually about the speed where the tires go from being
> compressed
> on the road to getting rounder from centripetal force. If
> there is any
> defect in the tire, that is the point where it usually shows
> up.
>
> By moving the bad tire to the back, you got some more life out
> of it
> before it became bad back there too. Now up front again, it
> is really
> telling you it's dead.
>
> If it was just a matter of throwing a weight or a bent rim,
> then
> balancing would have fixed it and it wouldn't be getting
> worse.
>
> I'll bet if you jack up each front corner and spin the tire,
> you will
> see one with a high spot.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

Dead on, man. Flat spot on the right front tire. Nice call guys

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JeepFan wrote:
> "Mike Romain" wrote:
> > JeepFan wrote:
> > >
> > > "Generic" wrote:
> > &nbsp;> > "JeepFan" &lt;UseLinkToEmail@AutoForumz.com&gt;
> > wrote in message
> > &nbsp;> >
> > news:1_581742_856900ca9787e7af1272cf7dea79a3b0@autoforumz.com...
> > &nbsp;&nbsp;> > > Hey, guys. I have a pretty serious
> > vibration in my jeep
> > &nbsp;> > when i am
> > &nbsp;&nbsp;> > > between 55 and 65 mph. When it first
> > started happening, i
> > &nbsp;> > got a tire
> > &nbsp;&nbsp;> > > rotation and balance, and that took care of
> > the problem.
> > &nbsp;> > Six months
> > &nbsp;&nbsp;> > > later, the vibration started again, rather
> > small this time,
> > &nbsp;> > but i
> > &nbsp;&nbsp;> > > still got another rotation and balance, and
> > now the
> > &nbsp;> > vibration is
> > &nbsp;&nbsp;> > > really bad. What could this be from?
> > &nbsp;> >
> > &nbsp;> > A defective tire? I once had a car vibrate like
> > crazy with a
> > &nbsp;> > blister/bubble
> > &nbsp;> > in the tread. Also make sure the wheels and mounts
> > aren't
> > &nbsp;> > warped. A wheel
> > &nbsp;> > may not be seating properly in one position?
> > &nbsp;> >
> > &nbsp;> >
> > &nbsp;> > -John
> > >
> > > Thanks for the tip. Any other thoughts? Why would it only
> > be in that
> > > speed? It stops once you get past 65mph...
> > >
> >
> > That is usually about the speed where the tires go from being
> > compressed
> > on the road to getting rounder from centripetal force. If
> > there is any
> > defect in the tire, that is the point where it usually shows
> > up.
> >
> > By moving the bad tire to the back, you got some more life out
> > of it
> > before it became bad back there too. Now up front again, it
> > is really
> > telling you it's dead.
> >
> > If it was just a matter of throwing a weight or a bent rim,
> > then
> > balancing would have fixed it and it wouldn't be getting
> > worse.
> >
> > I'll bet if you jack up each front corner and spin the tire,
> > you will
> > see one with a high spot.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
>
> Dead on, man. Flat spot on the right front tire. Nice call guys
>
just out of curiosity.....what brand of tires are they???