2004 WJ 4.7L low freq vibe normal?
 

Hello all!

Are low frequency driveline vibrations normal with the Quadra-Trac II
(NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at high
highway speeds? The vibration is only mildly noticeable at around 65-73
MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating. The
vibe is not in the steering wheel any more than any other part of the
vehicle. The vibration is present even if the transmission is slipped into
neutral, though appears stronger when the engine is either accelerating the
vehicle or being used to slow the vehicle down. The only other thing that I
noticed is that with the parking brake on and transmission in neutral,
shaking the front prop shaft side to side near the front diff yields no
play, but shaking it side to side near the transfer case yields a little bit
of play.
Since this Grand Cherokee is only a week old, I took it to the dealer.
The tech was able to feel the vibe and identified that it was from the
front. They re-balanced the front tires and indexed the front driveshaft
(spun 180 degrees). They then drove another new WJ and told me that the
vibe is normal. They have offered to let me drive another new WJ to prove
it to me which I will do.
This vibration was definitely not normal to a 2003 WJ with the same
4.7L/QT-II that I drove in regularly for a while, and it wasn't in my good
old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
Is this normal? Suggestions?

Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Most of the noise and vibration will be the tires, unless you're
replaced the truck tires with passenger type street tires.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hello all!
>
> Are low frequency driveline vibrations normal with the Quadra-Trac II
> (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at high
> highway speeds? The vibration is only mildly noticeable at around 65-73
> MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating. The
> vibe is not in the steering wheel any more than any other part of the
> vehicle. The vibration is present even if the transmission is slipped into
> neutral, though appears stronger when the engine is either accelerating the
> vehicle or being used to slow the vehicle down. The only other thing that I
> noticed is that with the parking brake on and transmission in neutral,
> shaking the front prop shaft side to side near the front diff yields no
> play, but shaking it side to side near the transfer case yields a little bit
> of play.
> Since this Grand Cherokee is only a week old, I took it to the dealer.
> The tech was able to feel the vibe and identified that it was from the
> front. They re-balanced the front tires and indexed the front driveshaft
> (spun 180 degrees). They then drove another new WJ and told me that the
> vibe is normal. They have offered to let me drive another new WJ to prove
> it to me which I will do.
> This vibration was definitely not normal to a 2003 WJ with the same
> 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my good
> old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> Is this normal? Suggestions?
>
> Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Most of the noise and vibration will be the tires, unless you're
replaced the truck tires with passenger type street tires.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hello all!
>
> Are low frequency driveline vibrations normal with the Quadra-Trac II
> (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at high
> highway speeds? The vibration is only mildly noticeable at around 65-73
> MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating. The
> vibe is not in the steering wheel any more than any other part of the
> vehicle. The vibration is present even if the transmission is slipped into
> neutral, though appears stronger when the engine is either accelerating the
> vehicle or being used to slow the vehicle down. The only other thing that I
> noticed is that with the parking brake on and transmission in neutral,
> shaking the front prop shaft side to side near the front diff yields no
> play, but shaking it side to side near the transfer case yields a little bit
> of play.
> Since this Grand Cherokee is only a week old, I took it to the dealer.
> The tech was able to feel the vibe and identified that it was from the
> front. They re-balanced the front tires and indexed the front driveshaft
> (spun 180 degrees). They then drove another new WJ and told me that the
> vibe is normal. They have offered to let me drive another new WJ to prove
> it to me which I will do.
> This vibration was definitely not normal to a 2003 WJ with the same
> 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my good
> old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> Is this normal? Suggestions?
>
> Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Most of the noise and vibration will be the tires, unless you're
replaced the truck tires with passenger type street tires.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hello all!
>
> Are low frequency driveline vibrations normal with the Quadra-Trac II
> (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at high
> highway speeds? The vibration is only mildly noticeable at around 65-73
> MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating. The
> vibe is not in the steering wheel any more than any other part of the
> vehicle. The vibration is present even if the transmission is slipped into
> neutral, though appears stronger when the engine is either accelerating the
> vehicle or being used to slow the vehicle down. The only other thing that I
> noticed is that with the parking brake on and transmission in neutral,
> shaking the front prop shaft side to side near the front diff yields no
> play, but shaking it side to side near the transfer case yields a little bit
> of play.
> Since this Grand Cherokee is only a week old, I took it to the dealer.
> The tech was able to feel the vibe and identified that it was from the
> front. They re-balanced the front tires and indexed the front driveshaft
> (spun 180 degrees). They then drove another new WJ and told me that the
> vibe is normal. They have offered to let me drive another new WJ to prove
> it to me which I will do.
> This vibration was definitely not normal to a 2003 WJ with the same
> 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my good
> old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> Is this normal? Suggestions?
>
> Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Hm... I hadn't considered that because the Wrangler ST's on it are so much
less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
this kind of vibration worse when under the light acceleration or
deceleration load?

"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:415A0C5A.8CCEE06A@cox.net...
> Most of the noise and vibration will be the tires, unless you're
> replaced the truck tires with passenger type street tires.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> cr480 wrote:
> >
> > Hello all!
> >
> > Are low frequency driveline vibrations normal with the Quadra-Trac II
> > (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at
high
> > highway speeds? The vibration is only mildly noticeable at around 65-73
> > MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating.
The
> > vibe is not in the steering wheel any more than any other part of the
> > vehicle. The vibration is present even if the transmission is slipped
into
> > neutral, though appears stronger when the engine is either accelerating
the
> > vehicle or being used to slow the vehicle down. The only other thing
that I
> > noticed is that with the parking brake on and transmission in neutral,
> > shaking the front prop shaft side to side near the front diff yields no
> > play, but shaking it side to side near the transfer case yields a little
bit
> > of play.
> > Since this Grand Cherokee is only a week old, I took it to the
dealer.
> > The tech was able to feel the vibe and identified that it was from the
> > front. They re-balanced the front tires and indexed the front
driveshaft
> > (spun 180 degrees). They then drove another new WJ and told me that the
> > vibe is normal. They have offered to let me drive another new WJ to
prove
> > it to me which I will do.
> > This vibration was definitely not normal to a 2003 WJ with the same
> > 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my
good
> > old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> > Is this normal? Suggestions?
> >
> > Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Hm... I hadn't considered that because the Wrangler ST's on it are so much
less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
this kind of vibration worse when under the light acceleration or
deceleration load?

"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:415A0C5A.8CCEE06A@cox.net...
> Most of the noise and vibration will be the tires, unless you're
> replaced the truck tires with passenger type street tires.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> cr480 wrote:
> >
> > Hello all!
> >
> > Are low frequency driveline vibrations normal with the Quadra-Trac II
> > (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at
high
> > highway speeds? The vibration is only mildly noticeable at around 65-73
> > MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating.
The
> > vibe is not in the steering wheel any more than any other part of the
> > vehicle. The vibration is present even if the transmission is slipped
into
> > neutral, though appears stronger when the engine is either accelerating
the
> > vehicle or being used to slow the vehicle down. The only other thing
that I
> > noticed is that with the parking brake on and transmission in neutral,
> > shaking the front prop shaft side to side near the front diff yields no
> > play, but shaking it side to side near the transfer case yields a little
bit
> > of play.
> > Since this Grand Cherokee is only a week old, I took it to the
dealer.
> > The tech was able to feel the vibe and identified that it was from the
> > front. They re-balanced the front tires and indexed the front
driveshaft
> > (spun 180 degrees). They then drove another new WJ and told me that the
> > vibe is normal. They have offered to let me drive another new WJ to
prove
> > it to me which I will do.
> > This vibration was definitely not normal to a 2003 WJ with the same
> > 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my
good
> > old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> > Is this normal? Suggestions?
> >
> > Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

Hm... I hadn't considered that because the Wrangler ST's on it are so much
less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
this kind of vibration worse when under the light acceleration or
deceleration load?

"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:415A0C5A.8CCEE06A@cox.net...
> Most of the noise and vibration will be the tires, unless you're
> replaced the truck tires with passenger type street tires.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> cr480 wrote:
> >
> > Hello all!
> >
> > Are low frequency driveline vibrations normal with the Quadra-Trac II
> > (NV247) / Dana 44/226MM rear axle, standard 4.7L V8 WJ when driven at
high
> > highway speeds? The vibration is only mildly noticeable at around 65-73
> > MPH, but the feel of the floor pan at 80 MPH is somewhat aggravating.
The
> > vibe is not in the steering wheel any more than any other part of the
> > vehicle. The vibration is present even if the transmission is slipped
into
> > neutral, though appears stronger when the engine is either accelerating
the
> > vehicle or being used to slow the vehicle down. The only other thing
that I
> > noticed is that with the parking brake on and transmission in neutral,
> > shaking the front prop shaft side to side near the front diff yields no
> > play, but shaking it side to side near the transfer case yields a little
bit
> > of play.
> > Since this Grand Cherokee is only a week old, I took it to the
dealer.
> > The tech was able to feel the vibe and identified that it was from the
> > front. They re-balanced the front tires and indexed the front
driveshaft
> > (spun 180 degrees). They then drove another new WJ and told me that the
> > vibe is normal. They have offered to let me drive another new WJ to
prove
> > it to me which I will do.
> > This vibration was definitely not normal to a 2003 WJ with the same
> > 4.7L/QT-II that I drove in regularly for a while, and it wasn't in my
good
> > old 5.2L ZJ. (I don't know if that one had U-joints or Cardin however.)
> > Is this normal? Suggestions?
> >
> > Thanks!

Re: 2004 WJ 4.7L low freq vibe normal?
 

The only Goodyear Wranglers with the S and T nomenclature rates a
six, that's not very good:
http://www.tirerack.com/tires/tires....rangler+RT%2FS
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hm... I hadn't considered that because the Wrangler ST's on it are so much
> less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
> this kind of vibration worse when under the light acceleration or
> deceleration load?

Re: 2004 WJ 4.7L low freq vibe normal?
 

The only Goodyear Wranglers with the S and T nomenclature rates a
six, that's not very good:
http://www.tirerack.com/tires/tires....rangler+RT%2FS
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hm... I hadn't considered that because the Wrangler ST's on it are so much
> less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
> this kind of vibration worse when under the light acceleration or
> deceleration load?

Re: 2004 WJ 4.7L low freq vibe normal?
 

The only Goodyear Wranglers with the S and T nomenclature rates a
six, that's not very good:
http://www.tirerack.com/tires/tires....rangler+RT%2FS
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

cr480 wrote:
>
> Hm... I hadn't considered that because the Wrangler ST's on it are so much
> less truck-ish looking than my ZJ's plain old Wranglers. Tires would make
> this kind of vibration worse when under the light acceleration or
> deceleration load?