| [GMCnet] The Dancing Avion [message #342477] |
Fri, 12 April 2019 10:04  |
Dean Hanson
Messages: 114
Registered: May 2018
Karma: 2
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Senior Member |
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Throwing this out to the community as I have not found the answer. My 26' -
1975 Avion, with 72K miles, in storage for 5 plus years, now with about 100
local miles and no freeway excursions, "dances" from one drive wheel to the
other, when accelerating from a stop. Especially, if I put the pedal to the
metal or am turning right or left. It stops traction on one wheel and shifts
to the other side. Rapidly back and forth. I swapped CV's with no change.
It's driving me nuts to find what to fix.
Dean C. Hanson
P.O.Box 2096
Fremont, Ca. 94536
(510) 657-9600
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| Re: [GMCnet] The Dancing Avion [message #342479 is a reply to message #342477] |
Fri, 12 April 2019 10:11  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Nothing to fix. Ease up on the throttle a bit. What you are experiencing is
called "torque steer" somewhat common to front drive vehicles. Be sure your
tire inflation is correct for the weight on the front end, and that
alignment is correct.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Fri, Apr 12, 2019, 8:05 AM Dean Hanson via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Throwing this out to the community as I have not found the answer. My 26' -
> 1975 Avion, with 72K miles, in storage for 5 plus years, now with about 100
> local miles and no freeway excursions, "dances" from one drive wheel to the
> other, when accelerating from a stop. Especially, if I put the pedal to the
> metal or am turning right or left. It stops traction on one wheel and
> shifts
> to the other side. Rapidly back and forth. I swapped CV's with no change.
> It's driving me nuts to find what to fix.
>
>
>
> Dean C. Hanson
>
> P.O.Box 2096
>
> Fremont, Ca. 94536
>
> (510) 657-9600
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] The Dancing Avion [message #342480 is a reply to message #342479] |
Fri, 12 April 2019 10:24 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Particularly toe in. Try these specs. Ride height on the front needs to be
correct before alignment. Yours Is most likely low. Camber 0°, Caster +3°,
Toe, out 1/16" to 1/8". Drive the coach several miles after ride height
adjustments. Do NOT just bounce the front bumper. Jerry Work has an online
step by step alignment summary. I suggest that you look at that. Very well
done.
Jim Hupy
On Fri, Apr 12, 2019, 8:11 AM James Hupy wrote:
> Nothing to fix. Ease up on the throttle a bit. What you are experiencing
> is called "torque steer" somewhat common to front drive vehicles. Be sure
> your tire inflation is correct for the weight on the front end, and that
> alignment is correct.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Fri, Apr 12, 2019, 8:05 AM Dean Hanson via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Throwing this out to the community as I have not found the answer. My 26'
>> -
>> 1975 Avion, with 72K miles, in storage for 5 plus years, now with about
>> 100
>> local miles and no freeway excursions, "dances" from one drive wheel to
>> the
>> other, when accelerating from a stop. Especially, if I put the pedal to
>> the
>> metal or am turning right or left. It stops traction on one wheel and
>> shifts
>> to the other side. Rapidly back and forth. I swapped CV's with no change.
>> It's driving me nuts to find what to fix.
>>
>>
>>
>> Dean C. Hanson
>>
>> P.O.Box 2096
>>
>> Fremont, Ca. 94536
>>
>> (510) 657-9600
>>
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
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| Re: [GMCnet] The Dancing Avion [message #342489 is a reply to message #342480] |
Sat, 13 April 2019 05:19 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Well Mr. Jim beat me to this posting.
Mine did that for several years until I set the front and rear heights exactly and it all went away. Follow Jim's specs.
One other thing is to check the lower A frame bushings. If they are worn the alignment will change as you accelerate and decelerate because the pull of the driving wheels causes the lower a frame to move forward and backwards on the bad bushings. If you replace them get the urethane ones from Energy Suspension.
James Hupy wrote on Fri, 12 April 2019 10:24Particularly toe in. Try these specs. Ride height on the front needs to be
correct before alignment. Yours Is most likely low. Camber 0°, Caster +3°,
Toe, out 1/16" to 1/8". Drive the coach several miles after ride height
adjustments. Do NOT just bounce the front bumper. Jerry Work has an online
step by step alignment summary. I suggest that you look at that. Very well
done.
Jim Hupy
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] The Dancing Avion [message #342496 is a reply to message #342489] |
Sat, 13 April 2019 10:28 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Sometimes the steering box is not clocked off center and the excess play
will amplify the torque steer.
On Sat, Apr 13, 2019 at 3:22 AM Ken Burton via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Well Mr. Jim beat me to this posting.
>
> Mine did that for several years until I set the front and rear heights
> exactly and it all went away. Follow Jim's specs.
>
> One other thing is to check the lower A frame bushings. If they are worn
> the alignment will change as you accelerate and decelerate because the pull
> of the driving wheels causes the lower a frame to move forward and
> backwards on the bad bushings. If you replace them get the urethane ones
> from
> Energy Suspension.
>
> James Hupy wrote on Fri, 12 April 2019 10:24
>> Particularly toe in. Try these specs. Ride height on the front needs to
> be
>> correct before alignment. Yours Is most likely low. Camber 0°, Caster
> +3°,
>> Toe, out 1/16" to 1/8". Drive the coach several miles after ride height
>> adjustments. Do NOT just bounce the front bumper. Jerry Work has an
> online
>> step by step alignment summary. I suggest that you look at that. Very
> well
>> done.
>> Jim Hupy
>
>
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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