L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

I've never used four wheel drive on a highway.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Crap Bill, I can just see someone doing 65 mph and in order to shift
> having to stop on the highway and go backward against 70 mph traffic to
> shift to 2WD. LOL! Too funny....
>
> Mike

Mike Romain

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Mike Romain

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Mike Romain

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Jeff Lowe

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Jeff Lowe

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Jeff Lowe

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Jeff Strickland

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >

Jeff Strickland

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >

Jeff Strickland

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >