NP231 from TJ into YJ?
 

I'm replacing a dead NP231J transfer case in my '92 YJ (4.0L, 5 speed).
There seem to be a large number of used, low-mileage TJ-version NP231's
around, which leads me to the following questions regarding interchanging
between the YJ and TJ versions:
1. Other than the fluid-retension setup, are there any differences between
these two versions that would be issues in using a TJ version on a YJ?
2. Barring major incompatabilities above, what adaptations need to happen to
use a TJ case on a YJ?
3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?

I've got the old transfer case out, so I'd appreciate the group's opinions
on this setup, particularly from anyone who has done it.

Thanks!
Dave

Re: NP231 from TJ into YJ?
 

In article <Ol59b.13885$NX3.5158@nwrddc01.gnilink.net>, "Mighty Monad"
<mighty_monad@spammer.go.awaywolftechnology.net> writes:

>1. Other than the fluid-retension setup, are there any differences between
>these two versions that would be issues in using a TJ version on a YJ?

I don't think there will be any functional differences.

>2. Barring major incompatabilities above, what adaptations need to happen to
>use a TJ case on a YJ?

Possibly shifter-lever opening trimming, unless you are able to use the
existing YJ shift lever, which I am pretty sure you can.

>3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?

Driveshaft length...you'd probably install the case to measure for the new
driveshaft, and pinion angle..you'd have to install wedge inserts to correct
the pinion angle for the new driveshaft.
* * *
Matt Macchiarolo
www.townpeddler.com
www.wolverine4wd.org
http://wolverine4wd.org/rigs/macchiarolo_ml.html

Re: NP231 from TJ into YJ?
 

In article <Ol59b.13885$NX3.5158@nwrddc01.gnilink.net>, "Mighty Monad"
<mighty_monad@spammer.go.awaywolftechnology.net> writes:

>1. Other than the fluid-retension setup, are there any differences between
>these two versions that would be issues in using a TJ version on a YJ?

I don't think there will be any functional differences.

>2. Barring major incompatabilities above, what adaptations need to happen to
>use a TJ case on a YJ?

Possibly shifter-lever opening trimming, unless you are able to use the
existing YJ shift lever, which I am pretty sure you can.

>3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?

Driveshaft length...you'd probably install the case to measure for the new
driveshaft, and pinion angle..you'd have to install wedge inserts to correct
the pinion angle for the new driveshaft.
* * *
Matt Macchiarolo
www.townpeddler.com
www.wolverine4wd.org
http://wolverine4wd.org/rigs/macchiarolo_ml.html

Re: NP231 from TJ into YJ?
 

Hi Dave,
Might look to see if it still has a threaded hole for your vacuum
switch: http://www.off-road.com/jeep/reviews.../np231-vac.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mighty Monad wrote:
>
> I'm replacing a dead NP231J transfer case in my '92 YJ (4.0L, 5 speed).
> There seem to be a large number of used, low-mileage TJ-version NP231's
> around, which leads me to the following questions regarding interchanging
> between the YJ and TJ versions:
> 1. Other than the fluid-retension setup, are there any differences between
> these two versions that would be issues in using a TJ version on a YJ?
> 2. Barring major incompatabilities above, what adaptations need to happen to
> use a TJ case on a YJ?
> 3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?
>
> I've got the old transfer case out, so I'd appreciate the group's opinions
> on this setup, particularly from anyone who has done it.
>
> Thanks!
> Dave

Re: NP231 from TJ into YJ?
 

Hi Dave,
Might look to see if it still has a threaded hole for your vacuum
switch: http://www.off-road.com/jeep/reviews.../np231-vac.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mighty Monad wrote:
>
> I'm replacing a dead NP231J transfer case in my '92 YJ (4.0L, 5 speed).
> There seem to be a large number of used, low-mileage TJ-version NP231's
> around, which leads me to the following questions regarding interchanging
> between the YJ and TJ versions:
> 1. Other than the fluid-retension setup, are there any differences between
> these two versions that would be issues in using a TJ version on a YJ?
> 2. Barring major incompatabilities above, what adaptations need to happen to
> use a TJ case on a YJ?
> 3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?
>
> I've got the old transfer case out, so I'd appreciate the group's opinions
> on this setup, particularly from anyone who has done it.
>
> Thanks!
> Dave

Re: NP231 from TJ into YJ?
 

On Sun, 14 Sep 2003 21:47:26 UTC "Mighty Monad"
<mighty_monad@spammer.go.awaywolftechnology.net> wrote:

> I'm replacing a dead NP231J transfer case in my '92 YJ (4.0L, 5 speed).
> There seem to be a large number of used, low-mileage TJ-version NP231's
> around, which leads me to the following questions regarding interchanging
> between the YJ and TJ versions:
> 1. Other than the fluid-retension setup, are there any differences between
> these two versions that would be issues in using a TJ version on a YJ?
> 2. Barring major incompatabilities above, what adaptations need to happen to
> use a TJ case on a YJ?
> 3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?
>
> I've got the old transfer case out, so I'd appreciate the group's opinions
> on this setup, particularly from anyone who has done it.

Only potential issue I can see - besides the new driveshaft - would be
the spline count on the input shaft to the tc. I think it's the same
but it could differ between auto/manual versions.

--
Will Honea <whonea@codenet.net>

Re: NP231 from TJ into YJ?
 

On Sun, 14 Sep 2003 21:47:26 UTC "Mighty Monad"
<mighty_monad@spammer.go.awaywolftechnology.net> wrote:

> I'm replacing a dead NP231J transfer case in my '92 YJ (4.0L, 5 speed).
> There seem to be a large number of used, low-mileage TJ-version NP231's
> around, which leads me to the following questions regarding interchanging
> between the YJ and TJ versions:
> 1. Other than the fluid-retension setup, are there any differences between
> these two versions that would be issues in using a TJ version on a YJ?
> 2. Barring major incompatabilities above, what adaptations need to happen to
> use a TJ case on a YJ?
> 3. Are there issues with a TJ case, SYE kit and CV driveshaft in a YJ?
>
> I've got the old transfer case out, so I'd appreciate the group's opinions
> on this setup, particularly from anyone who has done it.

Only potential issue I can see - besides the new driveshaft - would be
the spline count on the input shaft to the tc. I think it's the same
but it could differ between auto/manual versions.

--
Will Honea <whonea@codenet.net>

Re: NP231 from TJ into YJ?
 

In article <3F661145.C2C77D47@cox.net>, L.W.(=?iso-8859-1?Q?=DFill?=) ------
III <----------@cox.net> writes:

>Hi Dave,
> Might look to see if it still has a threaded hole for your vacuum

DOH! Forgot about that damn vacuum disconnect! My advice...remove it and either
install a cable-actuated disconnect or a solid axleshaft, like Real Jeeps use
:-)
* * *
Matt Macchiarolo
www.townpeddler.com
www.wolverine4wd.org
http://wolverine4wd.org/rigs/macchiarolo_ml.html

Re: NP231 from TJ into YJ?
 

In article <3F661145.C2C77D47@cox.net>, L.W.(=?iso-8859-1?Q?=DFill?=) ------
III <----------@cox.net> writes:

>Hi Dave,
> Might look to see if it still has a threaded hole for your vacuum

DOH! Forgot about that damn vacuum disconnect! My advice...remove it and either
install a cable-actuated disconnect or a solid axleshaft, like Real Jeeps use
:-)
* * *
Matt Macchiarolo
www.townpeddler.com
www.wolverine4wd.org
http://wolverine4wd.org/rigs/macchiarolo_ml.html

Re: NP231 from TJ into YJ?
 

Sounds like a good excuse to me.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Matt Macchiarolo wrote:
>
> DOH! Forgot about that damn vacuum disconnect! My advice...remove it and either
> install a cable-actuated disconnect or a solid axleshaft, like Real Jeeps use
> :-)
> * * *
> Matt Macchiarolo
> www.townpeddler.com
> www.wolverine4wd.org
> http://wolverine4wd.org/rigs/macchiarolo_ml.html