hopping during turn
01-31-2005, 07:24 AM
#11
Guest
Posts: n/a
Re: hopping during turn
Could be a bad U-joint.
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
01-31-2005, 07:24 AM
#12
Guest
Posts: n/a
Re: hopping during turn
Could be a bad U-joint.
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
01-31-2005, 07:24 AM
#13
Guest
Posts: n/a
Re: hopping during turn
Could be a bad U-joint.
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
JEEPR wrote:
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
01-31-2005, 12:04 PM
#14
Guest
Posts: n/a
Re: hopping during turn
It happens on drive pavement and tire press ok
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
01-31-2005, 12:04 PM
#15
Guest
Posts: n/a
Re: hopping during turn
It happens on drive pavement and tire press ok
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
01-31-2005, 12:04 PM
#16
Guest
Posts: n/a
Re: hopping during turn
It happens on drive pavement and tire press ok
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
It is continuous.
--
Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
01-31-2005, 01:15 PM
#17
Guest
Posts: n/a
Re: hopping during turn
That it's being driven in 4x4 on pavement is why it's happening. That
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
01-31-2005, 01:15 PM
#18
Guest
Posts: n/a
Re: hopping during turn
That it's being driven in 4x4 on pavement is why it's happening. That
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
01-31-2005, 01:15 PM
#19
Guest
Posts: n/a
Re: hopping during turn
That it's being driven in 4x4 on pavement is why it's happening. That
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
particular transfer case is designed for use offroad and that problem
will happen whenever it's driven on any surface that has good traction.
Jerry
JEEPR wrote:
> It happens on drive pavement and tire press ok
> It is continuous.
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
01-31-2005, 01:46 PM
#20
Guest
Posts: n/a
Re: hopping during turn
You are asking 2 questions here. It is OK to ask two questions, but I wanted
you to be sure you understood that.
1st, it sounds like you are using 4WD on dry pavement, and the drive train
is binding up. This causes a hop or a wobble in the steering wheel as the
tires try to slip on the ground to release the EXCESSIVE stress you are
putting on it. If you continue to use 4WD on hard pavement, you WILL destroy
the tcase. It isn't a matter of IF, it's a matter of WHEN.
2nd, if the tcase and/or front axles is bound up, then it can remain in 4WD
after you have selected 2WD. The way to get out of this bind is to select
2WD (2HI), then go in Reverse for about 25 ft. If the front end is still
bound up, repeat Reverse. You might get it to drop out of the bind if you
could find a place on dirt or gravel.
WHAT IS HAPPENING is that the transfer case can not accomodate the speed
differences in the front and rear axles. Because of this fundamental truth,
then there will be stress built up in the tcase. If the tires are on dirt or
gravel, the stress is released because the tires are slipping. Because you
are driving on the street, the stress can not be released easily and you
feel the buckling and lurching that results from the tires slipping on the
pavement. The differentials (large bulb-shaped parts in the middle of the
axles) accomodate speed differences from left to right. These differences
come from the outside tire travelling further than the inside tire during a
turn. The front and rear tires also travel different arcs in a turn,
therefore they also turn at different speeds. So, in 4WD, all four tires can
turn at different speeds, this is especially true in the hard turns that you
described in your symptoms. Not only do the left and right side tires go
different speeds, but the front and rear tires go at different speeds as
well. The tcase is not designed to accomodate the differences from front to
rear, as the differentials are designed to do for right to left.
The front axle is connected to the driveshaft via a slip joint kind of
arrangement inside the axle itself. When you select 4WD, either 4HI or 4LO,
there is vacuum that is supplied via the transfer case to the front axle.
This vacuum activates a fork that moves the slip joint over splines on the
axle shaft. You are describing a symptom where the slip joint is not
releasing. A reason it is not is that the axle shafts are bound up, and you
unbind them by going backwards. You do not need speed, in fact speed is
probably problematic for inducing the slip joint to release. You could
experiment with gently turning the steering wheel from side to side. This
will cause the axle halves to go at slightly different speeds, and the slip
joint can slip more easily.
Your '88 YJ has the same limitations, by the way.
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>
you to be sure you understood that.
1st, it sounds like you are using 4WD on dry pavement, and the drive train
is binding up. This causes a hop or a wobble in the steering wheel as the
tires try to slip on the ground to release the EXCESSIVE stress you are
putting on it. If you continue to use 4WD on hard pavement, you WILL destroy
the tcase. It isn't a matter of IF, it's a matter of WHEN.
2nd, if the tcase and/or front axles is bound up, then it can remain in 4WD
after you have selected 2WD. The way to get out of this bind is to select
2WD (2HI), then go in Reverse for about 25 ft. If the front end is still
bound up, repeat Reverse. You might get it to drop out of the bind if you
could find a place on dirt or gravel.
WHAT IS HAPPENING is that the transfer case can not accomodate the speed
differences in the front and rear axles. Because of this fundamental truth,
then there will be stress built up in the tcase. If the tires are on dirt or
gravel, the stress is released because the tires are slipping. Because you
are driving on the street, the stress can not be released easily and you
feel the buckling and lurching that results from the tires slipping on the
pavement. The differentials (large bulb-shaped parts in the middle of the
axles) accomodate speed differences from left to right. These differences
come from the outside tire travelling further than the inside tire during a
turn. The front and rear tires also travel different arcs in a turn,
therefore they also turn at different speeds. So, in 4WD, all four tires can
turn at different speeds, this is especially true in the hard turns that you
described in your symptoms. Not only do the left and right side tires go
different speeds, but the front and rear tires go at different speeds as
well. The tcase is not designed to accomodate the differences from front to
rear, as the differentials are designed to do for right to left.
The front axle is connected to the driveshaft via a slip joint kind of
arrangement inside the axle itself. When you select 4WD, either 4HI or 4LO,
there is vacuum that is supplied via the transfer case to the front axle.
This vacuum activates a fork that moves the slip joint over splines on the
axle shaft. You are describing a symptom where the slip joint is not
releasing. A reason it is not is that the axle shafts are bound up, and you
unbind them by going backwards. You do not need speed, in fact speed is
probably problematic for inducing the slip joint to release. You could
experiment with gently turning the steering wheel from side to side. This
will cause the axle halves to go at slightly different speeds, and the slip
joint can slip more easily.
Your '88 YJ has the same limitations, by the way.
"JEEPR" <YJJPS@nospam@yahoo.ca> wrote in message
news:uPfLd.1748$Ck1.334219@news20.bellglobal.com.. .
> The old ladies 98 grand cherokee is hopping when making sharp rh or lh
> turns. She had not use the 4wd for a while until the recent snows.
> Could it be possible that the 4wd is stuck on even though 2 hi selected.
> Has anyone else experienced this
> What would be the cure.
> Mike Romain I would value your input on this one.
> Thanks to all for assistance.
>
> Have a 88 yj myself and love the tinkering. Just want to make sure I'm on
> the right trac.
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
>
>