"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:_uGdndtTObhNoBbYnZ2dnUVZ_sGqnZ2d@ez2.net...
>
> "Jeff" <JeffBallweg@gmail.com> wrote in message
> news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com...
> > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> > time and full time)
> >
> > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> > handle all the way back into the full-time position. I happened to be
> > accelerating a bit as I did so, and I immediately heard/felt a
> > repetitive clunk-clunk-clunk that appeared to be coming from the
> > transfer case/trans area. I immediately backed off the throttle, and
> > the noise quit. So, again, to experiment I gave it a fair bit of gas
> > and again got the clunk-clunk-clunk sounds.
> > Mind you, this is not the expected clump sound/feel that you get when
> > it engages or disengages properly, but rather is louder and stronger.
> > The front feels like it is engaged, but anytime there is any load on
> > it, such as accelerating (even fairly gently) it gives me the
> > thump-thump-thump.
> > Of course, not knowing what was going on, I dropped it out of 4 and
> > took it home in 2 wheel.
> >
> > I don't know if it could be related, but I just had the head gasket
> > replaced and had a valve job done at the same time. I've put on about
> > 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> > the shop's workmanship, as a relatively trouble-free vehicle has
> > quickly turned into a headache. I may or may not have run the four
> > wheel drive since then. (cant remember, if I did, it was once on snow.)
> >
> > Any help is greatly appreciated.
> >
>
> It is not related.
>
> It sounds like a stretched chain in the tcase. The chain stretches when
you
> use 4WD on dry pavement. Well, not just dry, but any pavement where the
> coefficient of friction is too great for the tires to slip on the ground
and
> release the stress that the tcase builds up.
>
> If you really have Full Time 4WD, then your problem could be the viscous
> coupler in the tcase.
>
Selec-Trac doesn't have a viscous coupler, just an inter-axle differential.
Chain sounds likely too, but I'm still betting on exhaust hitting the body.

Earle

 

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:_uGdndtTObhNoBbYnZ2dnUVZ_sGqnZ2d@ez2.net...
>
> "Jeff" <JeffBallweg@gmail.com> wrote in message
> news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com...
> > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> > time and full time)
> >
> > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> > handle all the way back into the full-time position. I happened to be
> > accelerating a bit as I did so, and I immediately heard/felt a
> > repetitive clunk-clunk-clunk that appeared to be coming from the
> > transfer case/trans area. I immediately backed off the throttle, and
> > the noise quit. So, again, to experiment I gave it a fair bit of gas
> > and again got the clunk-clunk-clunk sounds.
> > Mind you, this is not the expected clump sound/feel that you get when
> > it engages or disengages properly, but rather is louder and stronger.
> > The front feels like it is engaged, but anytime there is any load on
> > it, such as accelerating (even fairly gently) it gives me the
> > thump-thump-thump.
> > Of course, not knowing what was going on, I dropped it out of 4 and
> > took it home in 2 wheel.
> >
> > I don't know if it could be related, but I just had the head gasket
> > replaced and had a valve job done at the same time. I've put on about
> > 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> > the shop's workmanship, as a relatively trouble-free vehicle has
> > quickly turned into a headache. I may or may not have run the four
> > wheel drive since then. (cant remember, if I did, it was once on snow.)
> >
> > Any help is greatly appreciated.
> >
>
> It is not related.
>
> It sounds like a stretched chain in the tcase. The chain stretches when
you
> use 4WD on dry pavement. Well, not just dry, but any pavement where the
> coefficient of friction is too great for the tires to slip on the ground
and
> release the stress that the tcase builds up.
>
> If you really have Full Time 4WD, then your problem could be the viscous
> coupler in the tcase.
>
Selec-Trac doesn't have a viscous coupler, just an inter-axle differential.
Chain sounds likely too, but I'm still betting on exhaust hitting the body.

Earle

 

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:_uGdndtTObhNoBbYnZ2dnUVZ_sGqnZ2d@ez2.net...
>
> "Jeff" <JeffBallweg@gmail.com> wrote in message
> news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com...
> > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> > time and full time)
> >
> > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> > handle all the way back into the full-time position. I happened to be
> > accelerating a bit as I did so, and I immediately heard/felt a
> > repetitive clunk-clunk-clunk that appeared to be coming from the
> > transfer case/trans area. I immediately backed off the throttle, and
> > the noise quit. So, again, to experiment I gave it a fair bit of gas
> > and again got the clunk-clunk-clunk sounds.
> > Mind you, this is not the expected clump sound/feel that you get when
> > it engages or disengages properly, but rather is louder and stronger.
> > The front feels like it is engaged, but anytime there is any load on
> > it, such as accelerating (even fairly gently) it gives me the
> > thump-thump-thump.
> > Of course, not knowing what was going on, I dropped it out of 4 and
> > took it home in 2 wheel.
> >
> > I don't know if it could be related, but I just had the head gasket
> > replaced and had a valve job done at the same time. I've put on about
> > 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> > the shop's workmanship, as a relatively trouble-free vehicle has
> > quickly turned into a headache. I may or may not have run the four
> > wheel drive since then. (cant remember, if I did, it was once on snow.)
> >
> > Any help is greatly appreciated.
> >
>
> It is not related.
>
> It sounds like a stretched chain in the tcase. The chain stretches when
you
> use 4WD on dry pavement. Well, not just dry, but any pavement where the
> coefficient of friction is too great for the tires to slip on the ground
and
> release the stress that the tcase builds up.
>
> If you really have Full Time 4WD, then your problem could be the viscous
> coupler in the tcase.
>
Selec-Trac doesn't have a viscous coupler, just an inter-axle differential.
Chain sounds likely too, but I'm still betting on exhaust hitting the body.

Earle

 

My bet is on a u-joint gone bad.

If the exhaust 'is' hitting, then check the engine mounts out
carefully. If the driver's side one goes on a 4.0, the exhaust will hit
the front driveshaft when under torque.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Jeff wrote:
>
> 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> time and full time)
>
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area. I immediately backed off the throttle, and
> the noise quit. So, again, to experiment I gave it a fair bit of gas
> and again got the clunk-clunk-clunk sounds.
> Mind you, this is not the expected clump sound/feel that you get when
> it engages or disengages properly, but rather is louder and stronger.
> The front feels like it is engaged, but anytime there is any load on
> it, such as accelerating (even fairly gently) it gives me the
> thump-thump-thump.
> Of course, not knowing what was going on, I dropped it out of 4 and
> took it home in 2 wheel.
>
> I don't know if it could be related, but I just had the head gasket
> replaced and had a valve job done at the same time. I've put on about
> 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> the shop's workmanship, as a relatively trouble-free vehicle has
> quickly turned into a headache. I may or may not have run the four
> wheel drive since then. (cant remember, if I did, it was once on snow.)
>
> Any help is greatly appreciated.

 

My bet is on a u-joint gone bad.

If the exhaust 'is' hitting, then check the engine mounts out
carefully. If the driver's side one goes on a 4.0, the exhaust will hit
the front driveshaft when under torque.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Jeff wrote:
>
> 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> time and full time)
>
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area. I immediately backed off the throttle, and
> the noise quit. So, again, to experiment I gave it a fair bit of gas
> and again got the clunk-clunk-clunk sounds.
> Mind you, this is not the expected clump sound/feel that you get when
> it engages or disengages properly, but rather is louder and stronger.
> The front feels like it is engaged, but anytime there is any load on
> it, such as accelerating (even fairly gently) it gives me the
> thump-thump-thump.
> Of course, not knowing what was going on, I dropped it out of 4 and
> took it home in 2 wheel.
>
> I don't know if it could be related, but I just had the head gasket
> replaced and had a valve job done at the same time. I've put on about
> 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> the shop's workmanship, as a relatively trouble-free vehicle has
> quickly turned into a headache. I may or may not have run the four
> wheel drive since then. (cant remember, if I did, it was once on snow.)
>
> Any help is greatly appreciated.

 

My bet is on a u-joint gone bad.

If the exhaust 'is' hitting, then check the engine mounts out
carefully. If the driver's side one goes on a 4.0, the exhaust will hit
the front driveshaft when under torque.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Jeff wrote:
>
> 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
> time and full time)
>
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area. I immediately backed off the throttle, and
> the noise quit. So, again, to experiment I gave it a fair bit of gas
> and again got the clunk-clunk-clunk sounds.
> Mind you, this is not the expected clump sound/feel that you get when
> it engages or disengages properly, but rather is louder and stronger.
> The front feels like it is engaged, but anytime there is any load on
> it, such as accelerating (even fairly gently) it gives me the
> thump-thump-thump.
> Of course, not knowing what was going on, I dropped it out of 4 and
> took it home in 2 wheel.
>
> I don't know if it could be related, but I just had the head gasket
> replaced and had a valve job done at the same time. I've put on about
> 4,000 miles since then and, I'm becoming increasingly dissatisfied with
> the shop's workmanship, as a relatively trouble-free vehicle has
> quickly turned into a headache. I may or may not have run the four
> wheel drive since then. (cant remember, if I did, it was once on snow.)
>
> Any help is greatly appreciated.

 

Jeff <JeffBallweg@gmail.com> wrote:
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area.
<snip>

My '98 Cherokee did that when the linkage was out of adjustment and it wasn't
"fully" engaged in 4WD.

The others could still be correct in that it is something more serious (chain,
u-joint, etc.), but I'd always start with the simple stuff and work from
there... :)

-John

 

Jeff <JeffBallweg@gmail.com> wrote:
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area.
<snip>

My '98 Cherokee did that when the linkage was out of adjustment and it wasn't
"fully" engaged in 4WD.

The others could still be correct in that it is something more serious (chain,
u-joint, etc.), but I'd always start with the simple stuff and work from
there... :)

-John

 

Jeff <JeffBallweg@gmail.com> wrote:
> Recently, leaving a driveway in the near-freezing rain I pulled the 4x4
> handle all the way back into the full-time position. I happened to be
> accelerating a bit as I did so, and I immediately heard/felt a
> repetitive clunk-clunk-clunk that appeared to be coming from the
> transfer case/trans area.
<snip>

My '98 Cherokee did that when the linkage was out of adjustment and it wasn't
"fully" engaged in 4WD.

The others could still be correct in that it is something more serious (chain,
u-joint, etc.), but I'd always start with the simple stuff and work from
there... :)

-John