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Old 12-08-2005, 20:01   #1 (permalink)
NJ
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Posts: n/a
F250 4X4 Tire Pressure and Uncontrolable Shaking

My brother works for a company where he is required to drive off road in
very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
of air in the tires. 80lbs results in an extremely rough ride, so he
logically pulled air presuure down to 38 lbs. When tire pressure is lowered
and a slight bump encountered at highway speed the front end starts shaking
uncontrolably and causes the vehicle to veer to the left. This is extremely
dangerous. Such that a fellow employee riding with him when he experienced
the shaking and veering left now refuses to ride in the vehicle.When he's
taken it in and told the mechanic of what he's experienced, they tell him
the tires being underinflated causes the truck to react as he describes.

The company policy requires the use of seat belts which ordinarily would not
be a problem, but when using them combined with such a rough ride in off
road conditions due to the tire pressure makes the working conditions for
him very uncomfortable. My brother is in his 50's and values his job....
doesn't want to make waves, but this has him in a very difficult situation.

My brother is a very special person and I would like to help him find a
solution to his problem. Wondering if anyone else has encountered the
problem and what they have found as a remedy. All responses would be
appreciated.

NJ




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Old 12-08-2005, 21:01   #2 (permalink)
Spdloader
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Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

What size are the tires?

Spdloader


"NJ" <nwilliams@door.net> wrote in message
news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> My brother works for a company where he is required to drive off road in
> very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
> of air in the tires. 80lbs results in an extremely rough ride, so he
> logically pulled air presuure down to 38 lbs. When tire pressure is
> lowered
> and a slight bump encountered at highway speed the front end starts
> shaking
> uncontrolably and causes the vehicle to veer to the left. This is
> extremely
> dangerous. Such that a fellow employee riding with him when he experienced
> the shaking and veering left now refuses to ride in the vehicle.When he's
> taken it in and told the mechanic of what he's experienced, they tell him
> the tires being underinflated causes the truck to react as he describes.
>
> The company policy requires the use of seat belts which ordinarily would
> not
> be a problem, but when using them combined with such a rough ride in off
> road conditions due to the tire pressure makes the working conditions for
> him very uncomfortable. My brother is in his 50's and values his job....
> doesn't want to make waves, but this has him in a very difficult
> situation.
>
> My brother is a very special person and I would like to help him find a
> solution to his problem. Wondering if anyone else has encountered the
> problem and what they have found as a remedy. All responses would be
> appreciated.
>
> NJ
>
>
>
>



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Old 12-09-2005, 05:01   #3 (permalink)
NJ
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

Not sure...I"ll check and post later...thanks for the feedback.

NJ

"Spdloader" <askforit@nospam.triad.rr.com> wrote in message
news:Zo7mf.115$eD5.303908@twister.southeast.rr.com...
> What size are the tires?
>
> Spdloader
>
>
> "NJ" <nwilliams@door.net> wrote in message
> news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> > My brother works for a company where he is required to drive off road in
> > very rough conditions. He's been issued an F250 4X4 and told to run 80

lbs
> > of air in the tires. 80lbs results in an extremely rough ride, so he
> > logically pulled air presuure down to 38 lbs. When tire pressure is
> > lowered
> > and a slight bump encountered at highway speed the front end starts
> > shaking
> > uncontrolably and causes the vehicle to veer to the left. This is
> > extremely
> > dangerous. Such that a fellow employee riding with him when he

experienced
> > the shaking and veering left now refuses to ride in the vehicle.When

he's
> > taken it in and told the mechanic of what he's experienced, they tell

him
> > the tires being underinflated causes the truck to react as he describes.
> >
> > The company policy requires the use of seat belts which ordinarily would
> > not
> > be a problem, but when using them combined with such a rough ride in off
> > road conditions due to the tire pressure makes the working conditions

for
> > him very uncomfortable. My brother is in his 50's and values his job....
> > doesn't want to make waves, but this has him in a very difficult
> > situation.
> >
> > My brother is a very special person and I would like to help him find a
> > solution to his problem. Wondering if anyone else has encountered the
> > problem and what they have found as a remedy. All responses would be
> > appreciated.
> >
> > NJ
> >
> >
> >
> >

>
>



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Old 12-09-2005, 05:01   #4 (permalink)
NJ
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

Correction on earlier post... tire pressure was lowered to 45lb instead of
38...

NJ

"NJ" <nwilliams@door.net> wrote in message
news:hNCdnfmGdYCk5wTeRVn-vA@valortelecom.com...
> Not sure...I"ll check and post later...thanks for the feedback.
>
> NJ
>
> "Spdloader" <askforit@nospam.triad.rr.com> wrote in message
> news:Zo7mf.115$eD5.303908@twister.southeast.rr.com...
> > What size are the tires?
> >
> > Spdloader
> >
> >
> > "NJ" <nwilliams@door.net> wrote in message
> > news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> > > My brother works for a company where he is required to drive off road

in
> > > very rough conditions. He's been issued an F250 4X4 and told to run 80

> lbs
> > > of air in the tires. 80lbs results in an extremely rough ride, so he
> > > logically pulled air presuure down to 38 lbs. When tire pressure is
> > > lowered
> > > and a slight bump encountered at highway speed the front end starts
> > > shaking
> > > uncontrolably and causes the vehicle to veer to the left. This is
> > > extremely
> > > dangerous. Such that a fellow employee riding with him when he

> experienced
> > > the shaking and veering left now refuses to ride in the vehicle.When

> he's
> > > taken it in and told the mechanic of what he's experienced, they tell

> him
> > > the tires being underinflated causes the truck to react as he

describes.
> > >
> > > The company policy requires the use of seat belts which ordinarily

would
> > > not
> > > be a problem, but when using them combined with such a rough ride in

off
> > > road conditions due to the tire pressure makes the working conditions

> for
> > > him very uncomfortable. My brother is in his 50's and values his

job....
> > > doesn't want to make waves, but this has him in a very difficult
> > > situation.
> > >
> > > My brother is a very special person and I would like to help him find

a
> > > solution to his problem. Wondering if anyone else has encountered the
> > > problem and what they have found as a remedy. All responses would be
> > > appreciated.
> > >
> > > NJ
> > >
> > >
> > >
> > >

> >
> >

>
>



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Old 12-09-2005, 06:01   #5 (permalink)
websurfer
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking


"NJ" <nwilliams@door.net> wrote in message
news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> My brother works for a company where he is required to drive off road in
> very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
> of air in the tires. 80lbs results in an extremely rough ride, so he
> logically pulled air presuure down to 38 lbs. When tire pressure is
> lowered
> and a slight bump encountered at highway speed the front end starts
> shaking
> uncontrolably and causes the vehicle to veer to the left. This is
> extremely
> dangerous. Such that a fellow employee riding with him when he experienced
> the shaking and veering left now refuses to ride in the vehicle.When he's
> taken it in and told the mechanic of what he's experienced, they tell him
> the tires being underinflated causes the truck to react as he describes.
>
> The company policy requires the use of seat belts which ordinarily would
> not
> be a problem, but when using them combined with such a rough ride in off
> road conditions due to the tire pressure makes the working conditions for
> him very uncomfortable. My brother is in his 50's and values his job....
> doesn't want to make waves, but this has him in a very difficult
> situation.
>
> My brother is a very special person and I would like to help him find a
> solution to his problem. Wondering if anyone else has encountered the
> problem and what they have found as a remedy. All responses would be
> appreciated.
>
> NJ
>
>

NJ - You don't say how many miles are on the vehicle, but I have a 1995
w/over 200k miles on it... my owners manual says front tires should be
inflated to 55lbs, and the rear to 80lbs, and I've never experienced the
behavior you describe. Your brothers company truck could have some worn
front end suspension parts as well, in combination with the underinflated
tires. Maybe he could ask to use a different truck for a couple of days,
just to see how it compares to the one he has now... Food for thought...


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Old 12-09-2005, 16:01   #6 (permalink)
Marlin Singer
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

NJ wrote:
> My brother works for a company where he is required to drive off road in
> very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
> of air in the tires. 80lbs results in an extremely rough ride, so he
> logically pulled air presuure down to 38 lbs. When tire pressure is lowered
> and a slight bump encountered at highway speed the front end starts shaking
> uncontrolably and causes the vehicle to veer to the left. This is extremely
> dangerous. Such that a fellow employee riding with him when he experienced
> the shaking and veering left now refuses to ride in the vehicle.When he's
> taken it in and told the mechanic of what he's experienced, they tell him
> the tires being underinflated causes the truck to react as he describes.
>
> The company policy requires the use of seat belts which ordinarily would not
> be a problem, but when using them combined with such a rough ride in off
> road conditions due to the tire pressure makes the working conditions for
> him very uncomfortable. My brother is in his 50's and values his job....
> doesn't want to make waves, but this has him in a very difficult situation.
>
> My brother is a very special person and I would like to help him find a
> solution to his problem. Wondering if anyone else has encountered the
> problem and what they have found as a remedy. All responses would be
> appreciated.
>
> NJ
>
>
>
>

From the sounds of it, those are load range E tires. He should be
running those about 55 when unloaded. Will have to bump up a bit if
hauling a payload. The main factor here on pressure is load range of
tires and what you are hauling. If I had those on my F150, I would run
them at about 50.
My load range c's are run at 40 and if I had LR d's I would run them
about 45 on my F150 unloaded.
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Old 12-09-2005, 16:01   #7 (permalink)
CJB
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

Didn't we just have this problem about 6 months ago on a motor home? Seems
it was related to alignment, but I'm a bit foggy about it.

CJB

"NJ" <nwilliams@door.net> wrote in message
news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> My brother works for a company where he is required to drive off road in
> very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
> of air in the tires. 80lbs results in an extremely rough ride, so he
> logically pulled air presuure down to 38 lbs. When tire pressure is
> lowered
> and a slight bump encountered at highway speed the front end starts
> shaking
> uncontrolably and causes the vehicle to veer to the left. This is
> extremely
> dangerous. Such that a fellow employee riding with him when he experienced
> the shaking and veering left now refuses to ride in the vehicle.When he's
> taken it in and told the mechanic of what he's experienced, they tell him
> the tires being underinflated causes the truck to react as he describes.
>
> The company policy requires the use of seat belts which ordinarily would
> not
> be a problem, but when using them combined with such a rough ride in off
> road conditions due to the tire pressure makes the working conditions for
> him very uncomfortable. My brother is in his 50's and values his job....
> doesn't want to make waves, but this has him in a very difficult
> situation.
>
> My brother is a very special person and I would like to help him find a
> solution to his problem. Wondering if anyone else has encountered the
> problem and what they have found as a remedy. All responses would be
> appreciated.
>
> NJ
>
>
>
>



  Reply With Quote
Old 12-11-2005, 15:01   #8 (permalink)
Matt Macchiarolo
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

What year F250? Stock sized tires?

"NJ" <nwilliams@door.net> wrote in message
news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> My brother works for a company where he is required to drive off road in
> very rough conditions. He's been issued an F250 4X4 and told to run 80 lbs
> of air in the tires. 80lbs results in an extremely rough ride, so he
> logically pulled air presuure down to 38 lbs. When tire pressure is
> lowered
> and a slight bump encountered at highway speed the front end starts
> shaking
> uncontrolably and causes the vehicle to veer to the left. This is
> extremely
> dangerous. Such that a fellow employee riding with him when he experienced
> the shaking and veering left now refuses to ride in the vehicle.When he's
> taken it in and told the mechanic of what he's experienced, they tell him
> the tires being underinflated causes the truck to react as he describes.
>
> The company policy requires the use of seat belts which ordinarily would
> not
> be a problem, but when using them combined with such a rough ride in off
> road conditions due to the tire pressure makes the working conditions for
> him very uncomfortable. My brother is in his 50's and values his job....
> doesn't want to make waves, but this has him in a very difficult
> situation.
>
> My brother is a very special person and I would like to help him find a
> solution to his problem. Wondering if anyone else has encountered the
> problem and what they have found as a remedy. All responses would be
> appreciated.
>
> NJ
>
>
>
>



  Reply With Quote
Old 12-11-2005, 17:01   #9 (permalink)
NJ
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

2005 and stock tires...

Has been in the shop and they have told him the shaking is due to tire not
being inflated to 80 lbs...

Thanks for the response..

NJ

"Matt Macchiarolo" <matt@nospamplease.com> wrote in message
news:baqdnQ0_kccYNAHenZ2dnUVZ_t6dnZ2d@comcast.com...
> What year F250? Stock sized tires?
>
> "NJ" <nwilliams@door.net> wrote in message
> news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
> > My brother works for a company where he is required to drive off road in
> > very rough conditions. He's been issued an F250 4X4 and told to run 80

lbs
> > of air in the tires. 80lbs results in an extremely rough ride, so he
> > logically pulled air presuure down to 38 lbs. When tire pressure is
> > lowered
> > and a slight bump encountered at highway speed the front end starts
> > shaking
> > uncontrolably and causes the vehicle to veer to the left. This is
> > extremely
> > dangerous. Such that a fellow employee riding with him when he

experienced
> > the shaking and veering left now refuses to ride in the vehicle.When

he's
> > taken it in and told the mechanic of what he's experienced, they tell

him
> > the tires being underinflated causes the truck to react as he describes.
> >
> > The company policy requires the use of seat belts which ordinarily would
> > not
> > be a problem, but when using them combined with such a rough ride in off
> > road conditions due to the tire pressure makes the working conditions

for
> > him very uncomfortable. My brother is in his 50's and values his job....
> > doesn't want to make waves, but this has him in a very difficult
> > situation.
> >
> > My brother is a very special person and I would like to help him find a
> > solution to his problem. Wondering if anyone else has encountered the
> > problem and what they have found as a remedy. All responses would be
> > appreciated.
> >
> > NJ
> >
> >
> >
> >

>
>



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Old 12-11-2005, 18:01   #10 (permalink)
Matt Macchiarolo
Guest
 
Posts: n/a
Re: F250 4X4 Tire Pressure and Uncontrolable Shaking

My 2002 requires 70 lbs rear, 55 lbs front for stock tires at full payload.
Look on the inside of the fuel filler for air pressure recommendations.
55lbs all around is probably sufficient for no payload driving.

"NJ" <nwilliams@door.net> wrote in message
news:28KdnQAnFuKyVwHeRVn-rw@valortelecom.com...
> 2005 and stock tires...
>
> Has been in the shop and they have told him the shaking is due to tire not
> being inflated to 80 lbs...
>
> Thanks for the response..
>
> NJ
>
> "Matt Macchiarolo" <matt@nospamplease.com> wrote in message
> news:baqdnQ0_kccYNAHenZ2dnUVZ_t6dnZ2d@comcast.com...
>> What year F250? Stock sized tires?
>>
>> "NJ" <nwilliams@door.net> wrote in message
>> news:o_ednVchs_KZagXenZ2dnUVZ_tWdnZ2d@valortelecom.com...
>> > My brother works for a company where he is required to drive off road
>> > in
>> > very rough conditions. He's been issued an F250 4X4 and told to run 80

> lbs
>> > of air in the tires. 80lbs results in an extremely rough ride, so he
>> > logically pulled air presuure down to 38 lbs. When tire pressure is
>> > lowered
>> > and a slight bump encountered at highway speed the front end starts
>> > shaking
>> > uncontrolably and causes the vehicle to veer to the left. This is
>> > extremely
>> > dangerous. Such that a fellow employee riding with him when he

> experienced
>> > the shaking and veering left now refuses to ride in the vehicle.When

> he's
>> > taken it in and told the mechanic of what he's experienced, they tell

> him
>> > the tires being underinflated causes the truck to react as he
>> > describes.
>> >
>> > The company policy requires the use of seat belts which ordinarily
>> > would
>> > not
>> > be a problem, but when using them combined with such a rough ride in
>> > off
>> > road conditions due to the tire pressure makes the working conditions

> for
>> > him very uncomfortable. My brother is in his 50's and values his
>> > job....
>> > doesn't want to make waves, but this has him in a very difficult
>> > situation.
>> >
>> > My brother is a very special person and I would like to help him find a
>> > solution to his problem. Wondering if anyone else has encountered the
>> > problem and what they have found as a remedy. All responses would be
>> > appreciated.
>> >
>> > NJ
>> >
>> >
>> >
>> >

>>
>>

>
>



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