In article <co1ac355l0sv4fnkb84fglrja7jfg7u4cc@4ax.com>,
SnoMan <admin@snoman.com> wrote:
#Worst case senerio, you could remove front drive shaft and lock Tcase
#and drive it home that way if it runs quiet that way and get it
#repaired at home later on.
#-----------------
#TheSnoMan.com

The 247 is a full-time t-case. I removed the front shaft on a '99 WJ
when the CV in the shaft lost it's grease and the thing started to
rattle. It drove just fine. Mileage went up .5 mpg or so before I
put in a greaseable u-joint shaft.

But with the wrong lube in the t-case, I don't know if any damage to
the t-case will be avoided by removing the front shaft.

/herb

 

In article <co1ac355l0sv4fnkb84fglrja7jfg7u4cc@4ax.com>,
SnoMan <admin@snoman.com> wrote:
#Worst case senerio, you could remove front drive shaft and lock Tcase
#and drive it home that way if it runs quiet that way and get it
#repaired at home later on.
#-----------------
#TheSnoMan.com

The 247 is a full-time t-case. I removed the front shaft on a '99 WJ
when the CV in the shaft lost it's grease and the thing started to
rattle. It drove just fine. Mileage went up .5 mpg or so before I
put in a greaseable u-joint shaft.

But with the wrong lube in the t-case, I don't know if any damage to
the t-case will be avoided by removing the front shaft.

/herb

 

In article <co1ac355l0sv4fnkb84fglrja7jfg7u4cc@4ax.com>,
SnoMan <admin@snoman.com> wrote:
#Worst case senerio, you could remove front drive shaft and lock Tcase
#and drive it home that way if it runs quiet that way and get it
#repaired at home later on.
#-----------------
#TheSnoMan.com

The 247 is a full-time t-case. I removed the front shaft on a '99 WJ
when the CV in the shaft lost it's grease and the thing started to
rattle. It drove just fine. Mileage went up .5 mpg or so before I
put in a greaseable u-joint shaft.

But with the wrong lube in the t-case, I don't know if any damage to
the t-case will be avoided by removing the front shaft.

/herb

 

In article <QaWdnXGO067PQ1XbnZ2dnUVZ_tKinZ2d@comcast.com>,
Lon <lon.stowell@comcast.net> wrote:
#
#I can see no "clutch" in the NP231 [2H 4H 4L N], there is a clutch shaft
#in the NP242 which appears to be part of the internal differential for
#the 4H full time [2H, 4H part time, 4H full time, 4Lo] the NP249 has a
#clutch sleeve [4H, 4L] with the viscous coupler and is somewhat fussy
#about fluid. Was surprised to see them mentioned as you are correct
#they are chain driven. All models have have the same diagnosis of
#noisy, not enough fluid or the wrong one.

The OP's t-case is a NV247. It has a clutch that is engaged by a
gerotor. When the front and rear shafts move at different speeds,
the gerotor pumps fluid into the clutch-pack. This locks the two
shafts so that the free spinning shaft stops spinning and the
gripping shaft gets more power.

The OP's diffs also have gerotors and require a additive to the
full synthetic gear lube.

What gets me is that the additive at the local autoparts store says
it meets the DC spec # for the lube but then specificaly states that
it's not for Jeeps with Quadradrive. GAh...

/herb

 

In article <QaWdnXGO067PQ1XbnZ2dnUVZ_tKinZ2d@comcast.com>,
Lon <lon.stowell@comcast.net> wrote:
#
#I can see no "clutch" in the NP231 [2H 4H 4L N], there is a clutch shaft
#in the NP242 which appears to be part of the internal differential for
#the 4H full time [2H, 4H part time, 4H full time, 4Lo] the NP249 has a
#clutch sleeve [4H, 4L] with the viscous coupler and is somewhat fussy
#about fluid. Was surprised to see them mentioned as you are correct
#they are chain driven. All models have have the same diagnosis of
#noisy, not enough fluid or the wrong one.

The OP's t-case is a NV247. It has a clutch that is engaged by a
gerotor. When the front and rear shafts move at different speeds,
the gerotor pumps fluid into the clutch-pack. This locks the two
shafts so that the free spinning shaft stops spinning and the
gripping shaft gets more power.

The OP's diffs also have gerotors and require a additive to the
full synthetic gear lube.

What gets me is that the additive at the local autoparts store says
it meets the DC spec # for the lube but then specificaly states that
it's not for Jeeps with Quadradrive. GAh...

/herb

 

In article <QaWdnXGO067PQ1XbnZ2dnUVZ_tKinZ2d@comcast.com>,
Lon <lon.stowell@comcast.net> wrote:
#
#I can see no "clutch" in the NP231 [2H 4H 4L N], there is a clutch shaft
#in the NP242 which appears to be part of the internal differential for
#the 4H full time [2H, 4H part time, 4H full time, 4Lo] the NP249 has a
#clutch sleeve [4H, 4L] with the viscous coupler and is somewhat fussy
#about fluid. Was surprised to see them mentioned as you are correct
#they are chain driven. All models have have the same diagnosis of
#noisy, not enough fluid or the wrong one.

The OP's t-case is a NV247. It has a clutch that is engaged by a
gerotor. When the front and rear shafts move at different speeds,
the gerotor pumps fluid into the clutch-pack. This locks the two
shafts so that the free spinning shaft stops spinning and the
gripping shaft gets more power.

The OP's diffs also have gerotors and require a additive to the
full synthetic gear lube.

What gets me is that the additive at the local autoparts store says
it meets the DC spec # for the lube but then specificaly states that
it's not for Jeeps with Quadradrive. GAh...

/herb

 

In article <QaWdnXGO067PQ1XbnZ2dnUVZ_tKinZ2d@comcast.com>,
Lon <lon.stowell@comcast.net> wrote:
#
#I can see no "clutch" in the NP231 [2H 4H 4L N], there is a clutch shaft
#in the NP242 which appears to be part of the internal differential for
#the 4H full time [2H, 4H part time, 4H full time, 4Lo] the NP249 has a
#clutch sleeve [4H, 4L] with the viscous coupler and is somewhat fussy
#about fluid. Was surprised to see them mentioned as you are correct
#they are chain driven. All models have have the same diagnosis of
#noisy, not enough fluid or the wrong one.

The OP's t-case is a NV247. It has a clutch that is engaged by a
gerotor. When the front and rear shafts move at different speeds,
the gerotor pumps fluid into the clutch-pack. This locks the two
shafts so that the free spinning shaft stops spinning and the
gripping shaft gets more power.

The OP's diffs also have gerotors and require a additive to the
full synthetic gear lube.

What gets me is that the additive at the local autoparts store says
it meets the DC spec # for the lube but then specificaly states that
it's not for Jeeps with Quadradrive. GAh...

/herb