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Old 10 Dec 2010, 07:35 pm
shallowpool
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Default Vibration under load

I have an 88 Integra with 155k miles. The engine runs well.
Automatic trans shifts firmly. It has developed a vibration under
load at about 55mph and up. The vibration is slowly getting worse
over time. It's not a tire problem. All the tires are relatively new
and in good shape.

Under load, the car vibrates at about tire rotation speed. It seems
to be noticeably worse when the car is warmed up. If I let off the
gas briefly, the vibration disappears.

Any ideas? I'm hoping this might be const velocity joints.
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  #2 (permalink)  
Old 10 Dec 2010, 08:15 pm
Tegger
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Default Re: Vibration under load

shallowpool <shallowpool@yahoo.com> wrote in news:1483f0fa-2593-4e44-a4d6-
9785ca856924@g26g2000vbi.googlegroups.com:

> I have an 88 Integra with 155k miles. The engine runs well.
> Automatic trans shifts firmly. It has developed a vibration under
> load at about 55mph and up. The vibration is slowly getting worse
> over time. It's not a tire problem. All the tires are relatively new
> and in good shape.
>
> Under load, the car vibrates at about tire rotation speed. It seems
> to be noticeably worse when the car is warmed up. If I let off the
> gas briefly, the vibration disappears.
>
> Any ideas? I'm hoping this might be const velocity joints.
>





Might be. Or not.

I have the same problem. Driveshaft replacement did not solve it.

After several years and much study, I have concluded that I have at least
one worn transmission bearing, probably the diff pinion bearing.

Really annoying, isn't it? If there's any consolation, the car will run
forever with it.


--
Tegger
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  #3 (permalink)  
Old 13 Dec 2010, 02:54 pm
shallowpool
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Default Re: Vibration under load

On Dec 10, 8:15*pm, Tegger <inva...@example.com> wrote:
> shallowpool <shallowp...@yahoo.com> wrote in news:1483f0fa-2593-4e44-a4d6-
> 9785ca856...@g26g2000vbi.googlegroups.com:
>
> > I have an 88 Integra with 155k miles. *The engine runs well.
> > Automatic trans shifts firmly. *It has developed a vibration under
> > load at about 55mph and up. *The vibration is slowly getting worse
> > over time. *It's not a tire problem. *All the tires are relatively new
> > and in good shape.

>
> > Under load, the car vibrates at about tire rotation speed. *It seems
> > to be noticeably worse when the car is warmed up. *If I let off the
> > gas briefly, the vibration disappears.

>
> > Any ideas? *I'm hoping this might be const velocity joints.

>
> Might be. Or not.
>
> I have the same problem. Driveshaft replacement did not solve it.
>
> After several years and much study, I have concluded that I have at least
> one worn transmission bearing, probably the diff pinion bearing.
>
> Really annoying, isn't it? If there's any consolation, the car will run
> forever with it.
>
> --
> Tegger


Thanks for the info. It just concerns me because the vibration has
gotten noticeably worse in the last year or so, and the feel of it is
more than just annoying, it's troubling. I find myself doing what I
can to abate the problem when going up hills and such.


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  #4 (permalink)  
Old 13 Dec 2010, 04:11 pm
dan
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Posts: n/a
Default Re: Vibration under load

I had an '88 Accord with a very similar problem. The vibration at speed
seemed to be coming from the axle on one side. I took it to a mechanic
who couldn't reproduce it at first, but found it after I insisted.
After the axle was replaced, there was no more problem.

I figured the axle got slightly bent after the car traveled across
country on a car carrier, and they used the axle as a tie-down point.

At your current mileage, it's not unusual for the cv joints to go bad,
or the boots rip with age, causing premature failure. Does your
vibration problem coming from one side more than another?

dan


On 12/10/2010 5:35 PM, shallowpool wrote:
> I have an 88 Integra with 155k miles. The engine runs well.
> Automatic trans shifts firmly. It has developed a vibration under
> load at about 55mph and up. The vibration is slowly getting worse
> over time. It's not a tire problem. All the tires are relatively new
> and in good shape.
>
> Under load, the car vibrates at about tire rotation speed. It seems
> to be noticeably worse when the car is warmed up. If I let off the
> gas briefly, the vibration disappears.
>
> Any ideas? I'm hoping this might be const velocity joints.


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  #5 (permalink)  
Old 13 Dec 2010, 05:08 pm
Tegger
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Posts: n/a
Default Re: Vibration under load

shallowpool <shallowpool@yahoo.com> wrote in
news:e73ffe99-78b7-4e8f-8165-376ac04486e9@v17g2000prc.googlegroups.com:


>
> Thanks for the info. It just concerns me because the vibration has
> gotten noticeably worse in the last year or so, and the feel of it is
> more than just annoying, it's troubling. I find myself doing what I
> can to abate the problem when going up hills and such.
>
>
>




If it's that bad, you need to have a garage check out the inner CV joints.

If the inner joints have ANY perceptible play, then they're worn.

--
Tegger
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