Bumps felt through Steering Wheel

[wayne rogewski]

Agree with Sully. swap the driver side front wheel first and test drive. That my narrow it down to a wheel / tire out of balance.
--
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan

 

[sgltrac]

The "bump" could be a lot of things. Swapping wheels is a quick and easy
way to rule out a wheel or tire problem. I suspect as Ken mentioned a
driveshaft issue but the wheel swap might isolate a tire with belt damage.
Tires with belt or cord damage can have some strange symptoms.

Sully
77 eleganza 2
Seattle

> Agree with Sully. swap the driver side front wheel first and test drive.
> That my narrow it down to a wheel / tire out of balance.
> --
> 77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson
> carb and dizzy.
> Mid Michigan
>
> _______________________________________________
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> Unsubscribe or Change List Options:
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>

 

[billvv]

> The "bump" could be a lot of things. Swapping wheels is a quick and easy
> way to rule out a wheel or tire problem. I suspect as Ken mentioned a
> driveshaft issue but the wheel swap might isolate a tire with belt damage.
> Tires with belt or cord damage can have some strange symptoms.

Forgot to mention, new Michelins and used wheels recently, FWIW. No bumps while moving wheel, just when holding to left; no bumps moving or holding to
right that I've been able to feel. Swap DS or PS tires/wheels? Or both, one side at a time? Question is really which side is likely to have the
problem given bumps only happen holding to left?

--
Bill Van Vlack
'76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid
November 2015; Since arrival: New HVAC blower, heat flap cable, headlight switch.

 

[sgltrac]

To rule out front wheels and tires I would remove both of them and switch
with either of the rears. Mark them if you want to remember where you
started. If the bump stays unchanged with the wheel swap next spot to check
is probably the driveshafts as others have mentioned. Is it a noise or a
noise and a tugging in the wheel? Noise and tugging while turned likely a
driveshaft. Does the noise or bump change depending on whether you are
loaded or not? Try the same turning operation driving like normal then try
it in neutral while coasting and see what you get.

Sully

On Monday, October 17, 2016, Bill Van Vlack
wrote:

> > The "bump" could be a lot of things. Swapping wheels is a quick and easy
> > way to rule out a wheel or tire problem. I suspect as Ken mentioned a
> > driveshaft issue but the wheel swap might isolate a tire with belt
> damage.
> > Tires with belt or cord damage can have some strange symptoms.
>
>
> Forgot to mention, new Michelins and used wheels recently, FWIW. No bumps
> while moving wheel, just when holding to left; no bumps moving or holding to
> right that I've been able to feel. Swap DS or PS tires/wheels? Or both,
> one side at a time? Question is really which side is likely to have the
> problem given bumps only happen holding to left?
>
> --
> Bill Van Vlack
> '76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath,
> Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o
> mid
> November 2015; Since arrival: New HVAC blower, heat flap cable, headlight
> switch.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[billvv]

> To rule out front wheels and tires I would remove both of them and switch
> with either of the rears. Mark them if you want to remember where you
> started. If the bump stays unchanged with the wheel swap next spot to check
> is probably the driveshafts as others have mentioned. Is it a noise or a
> noise and a tugging in the wheel? Noise and tugging while turned likely a
> driveshaft. Does the noise or bump change depending on whether you are
> loaded or not? Try the same turning operation driving like normal then try
> it in neutral while coasting and see what you get.

No noise, just a 'bump' - maybe a 'tug'. 2-3 per second holding the wheel slightly to the left at 60mph, correcting from 'wiggle'. No bump while
moving the wheel the few degrees to correct, just when I stop moving it and hold it to continue the correction. Stops when I return wheel to straight
ahead.
--
Bill Van Vlack
'76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid
November 2015; Since arrival: New HVAC blower, heat flap cable, headlight switch.

 

[a.]

> No noise, just a 'bump' - maybe a 'tug'. 2-3 per second holding the wheel slightly to the left at 60mph, correcting from 'wiggle'. No bump while
> moving the wheel the few degrees to correct, just when I stop moving it and hold it to continue the correction. Stops when I move the wheel back to
> straight ahead, and does not 'bump' while steering straight ahead. No 'bump' when I turn or hold the wheel to the right.
Tie rod end?
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Highest price does not guarantee highest quality."

 

[emerystora]

It could be a bearing in the outer CB joint. Especially if it doesn't occur when pointing straight ahead.

Emery Stora

>

>> To rule out front wheels and tires I would remove both of them and switch
>> with either of the rears. Mark them if you want to remember where you
>> started. If the bump stays unchanged with the wheel swap next spot to check
>> is probably the driveshafts as others have mentioned. Is it a noise or a
>> noise and a tugging in the wheel? Noise and tugging while turned likely a
>> driveshaft. Does the noise or bump change depending on whether you are
>> loaded or not? Try the same turning operation driving like normal then try
>> it in neutral while coasting and see what you get.
>
>
> No noise, just a 'bump' - maybe a 'tug'. 2-3 per second holding the wheel slightly to the left at 60mph, correcting from 'wiggle'. No bump while
> moving the wheel the few degrees to correct, just when I stop moving it and hold it to continue the correction. Stops when I return wheel to straight
> ahead.
> --
> Bill Van Vlack
> '76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid
> November 2015; Since arrival: New HVAC blower, heat flap cable, headlight switch.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[billvv]

> It could be a bearing in the outer CB joint. Especially if it doesn't occur when pointing straight ahead.

Bumps when turning left.... I'm guessing the passenger side CV joint?
--
Bill Van Vlack
'76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid
November 2015; Since arrival: New HVAC blower, heat flap cable, headlight switch.

 

[Jim Hupy]

Also, double check the drivers side retaining bolts on the final drive
flange. They are known to loosen up and the symptoms are as you have
described.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> It could be a bearing in the outer CB joint. Especially if it doesn't
> occur when pointing straight ahead.
>
> Emery Stora
>
> > On Oct 17, 2016, at 2:53 PM, Bill Van Vlack

> >

> >> To rule out front wheels and tires I would remove both of them and
> switch
> >> with either of the rears. Mark them if you want to remember where you
> >> started. If the bump stays unchanged with the wheel swap next spot to
> check
> >> is probably the driveshafts as others have mentioned. Is it a noise or a
> >> noise and a tugging in the wheel? Noise and tugging while turned likely
> a
> >> driveshaft. Does the noise or bump change depending on whether you are
> >> loaded or not? Try the same turning operation driving like normal then
> try
> >> it in neutral while coasting and see what you get.
> >
> >
> > No noise, just a 'bump' - maybe a 'tug'. 2-3 per second holding the
> wheel slightly to the left at 60mph, correcting from 'wiggle'. No bump while
> > moving the wheel the few degrees to correct, just when I stop moving it
> and hold it to continue the correction. Stops when I return wheel to
> straight
> > ahead.
> > --
> > Bill Van Vlack
> > '76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath,
> Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o
> mid
> > November 2015; Since arrival: New HVAC blower, heat flap cable,
> headlight switch.
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[john r. lebetski]

Another odd one to check is the fan hitting the shroud. You will hear and feel that noise.
--
John Lebetski
Woodstock, IL
77 Eleganza II
Source America First