possible aftermarket tcase???

cplchris · Aug 3, 2010

i was just getting under my kj to inspect everything and clean some areas up when i noticed a shiny tag on my tcase...long story short the tcase is made by new process gear in syracuse NY i did some research into the company and unfortunately he plant was closed down not too long ago... does any1 else have this tcase "new process gear madel 231 J" ? i just would like some input on quality of the tcase or if any1 on here knows the former companys reputation???

tjkj2002 · Aug 3, 2010

Pretty much all US pickups and SUV's either have a NP or NV t-case,they are the same company now.Don't worry about it and run it,it's a good t-case.

incommando · Aug 3, 2010

That is the t-case in the majority of KJ's, followed by the 242J, with the 6spd's getting the 241J. (J = jeep, C = chevy, etc...)

Some version of the 231 was in just about every jeep and many Chevies and Dodges for about 25 years.

I would not be surprised if it was the most common t-case in the U.S. for at least 2 decades.

Porkchop · Aug 3, 2010

tjkj2002 said:
Pretty much all US pickups and SUV's either have a NP or NV t-case,they are the same company now.Don't worry about it and run it,it's a good t-case.

Ditto and you can get an upgrade kit to make it more bullet proof if you want

ThunderbirdJunkie · Aug 3, 2010

NP/NV231 is light-duty xfer case God. Do not anger or taunt it, for it will ruin your day most unceremoniously.

Porkchop · Aug 3, 2010

Gota love that TBJ
I justed LMAO

tjkj2002 · Aug 3, 2010

Porkchop said:
Ditto and you can get an upgrade kit to make it more bullet proof if you want

No way to make the 231 stronger,only way's to make it self destruct faster is all(terra low kit).

ThunderbirdJunkie · Aug 3, 2010

the 4:1 terra low kit weakens the 231?

tjkj2002 · Aug 3, 2010

ThunderbirdJunkie said:
the 4:1 terra low kit weakens the 231?

Yes,they like to self destruct when in low when you get above 3000rpms.

cplchris · Aug 3, 2010

thanks for the input guys...i was just caught off guard by the shiny tag lol

J-Thompson · Aug 3, 2010

The 231 can be beefed up to be a 241J ,not a rock track, just not worth it
new HD chain
new input shaft
new out put shaft
hold about 1/2qt or so less oil
this will also make it hold up to Terra low gears
however at a cost of $2K you can buy a rock track and needed adapters for a few $$ more

incommando · Aug 3, 2010

The case body, where the chain goes, is physically wider on a 241 than on a 231. You can squeeze a 241 chain (50% wider) in a 231 case?

Porkchop · Aug 3, 2010

I did do the up grade on my 90 Wrangler and I like it never take it to 3000 in low never had to but it has many drive line up grades still got the 30 and 35 and I am runing 33s with a iron duke 4banger gearing is everything

J-Thompson · Aug 4, 2010

incommando said:
The case body, where the chain goes, is physically wider on a 241 than on a 231. You can squeeze a 241 chain (50% wider) in a 231 case?

yup
they make a specific "HD" for the 231 that is the same as the 241

LibertyFever · Aug 5, 2010

I'm surprised too that the same model T-case can be found in a YJ as a KJ. To be truthful There are small differences aren't there between the various 231 T-cases? I've heard that the spline count may different depending what vehicle they're used in.

I've heard you can buy an upgrade for it c/w beefier parts but I suppose it's the aluminum case that always fails.
http://www.4x4wire.com/jeep/tech/xfer/

Say, has anybody ever put a model 300 twin stick T-case in a Libby? That would be cool, and sturdy too. Advance Adapters must have a kit to make it work

tjkj2002 · Aug 5, 2010

LibertyFever said:
I'm surprised too that the same model T-case can be found in a YJ as a KJ. To be truthful There are small differences aren't there between the various 231 T-cases? I've heard that the spline count may different depending what vehicle they're used in.

I've heard you can buy an upgrade for it c/w beefier parts but I suppose it's the aluminum case that always fails.
http://www.4x4wire.com/jeep/tech/xfer/

Say, has anybody ever put a model 300 twin stick T-case in a Libby? That would be cool, and sturdy too. Advance Adapters must have a kit to make it work

There are many version of the 231 that have different inputs and outputs,lengths,and mounting surfaces.

No 300 but a much better version of the 205 version.............

You must be registered for see images attach

LibertyFever · Aug 5, 2010

You must be registered for see images attach

WoW, that pic is what I call "Jeep ****" (naughty)

I have to give it a perfect10.gif

incommando · Aug 5, 2010

SOME KJ's got the 241J, better than any Wrangler t-case outside of the 241OR "rocktrac"

tjkj2002 · Aug 5, 2010

incommando said:
SOME KJ's got the 241J, better than any Wrangler t-case outside of the 241OR "rocktrac"

Only for the 6-speeds and only reason was the KJ's 231 will not bolt up.Basically the same t-case as the 231 with a 1/4" wider chain is all the 241 is.

J-Thompson · Aug 5, 2010

tjkj2002 said:
Only for the 6-speeds and only reason was the KJ's 231 will not bolt up.Basically the same t-case as the 231 with a 1/4" wider chain is all the 241 is.

no it is bigger and better
I mean it is a 241 which is 10 more than a 231

kidding

to the dana 300 in a KJ
front out put is on the wrong side
you would need to do a "flip kit" to do it
but just like in a TJ it can be done
I have seen a write up on it
when you do it you can run a true flat belly pan ,frame rail to frame rail
with no body lift
and it can have 4 to 1 ,twin sticks and stronger
keep in mind that a 231 will handle small V8 power
it is the slip yoke that fails but with a HD sye that is not an issue

possible aftermarket tcase???

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