Modified XJ Cherokee Tech XJ (84-01)
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doubler

Old 10-14-2011, 11:22 PM
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quick Q:
so i got two np231 cases. can i slap those together and doubler it? . i got a guy that will machine me a full shaft and adapter plate. if need be. but has it been done?

just curious , any input would be awesome !
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Old 10-15-2011, 12:43 AM
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What would the point be? I cant see it working.
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Old 10-15-2011, 12:49 AM
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Wondering about this too... they make a kit for a 205.... don't know about the 231
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Old 10-15-2011, 01:42 AM
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Originally Posted by Omnipotent Octopus View Post
What would the point be? I cant see it working.
Moar gears.
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Old 10-15-2011, 06:06 AM
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If u build it I want one
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Old 10-15-2011, 07:24 AM
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YOu have to flip the front t-case. Widen the holes on the bottom to bolts on the trans. Yes it can be done.... I have one in my xj.

YOu will have to lengthen front drivehaft, and shorten your rear one. Of course you will have to build a new x-member and rework exhaust a lil, and cut the floor on the passenger side.
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Old 10-15-2011, 08:03 AM
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Originally Posted by PingPong
YOu have to flip the front t-case. Widen the holes on the bottom to bolts on the trans. Yes it can be done.... I have one in my xj.

YOu will have to lengthen front drivehaft, and shorten your rear one. Of course you will have to build a new x-member and rework exhaust a lil, and cut the floor on the passenger side.
hmmm...i have an extra one laying around too...distant future project material
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Old 10-15-2011, 10:09 AM
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Guy on Pirate sells a kit. Simplifies the whole thing a good bit.
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Old 10-15-2011, 11:55 AM
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Originally Posted by xjmarc View Post
Guy on Pirate sells a kit. Simplifies the whole thing a good bit.

I have a D&D kit in my XJ, and it is nicer then the Mad Rooster kit I have in the truggy I am building.

The D&D kit has more clocking options then the Mad Rooster. It is kinda hard to communicate with Duffy, but once you get talking to him it is worth the wait.

Be prepared to cut your floor, and do lots of fab work.I flat skidded the bottom of my rig, and I am definately happy I did it that way I also did cable shifter, and that simplified shifting the t-cases.
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Old 10-15-2011, 07:30 PM
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awesome so i can be done!!!!!!!! fab work is nothing i cant handle so it should make for a good project . is it worht it tho!! d&d u say hmmmm.... is it a good reliable setup or should i slap it together with a 300 or something ????????????

thanks for all the input and sorry for the late respone. theres only so many hours ina day lol!
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Old 10-15-2011, 08:34 PM
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The guy on pirate's sig says the kit is no longer avalible.
The 231-231 has a great crawl ratio.
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Old 10-16-2011, 09:00 AM
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Originally Posted by xj101 View Post
awesome so i can be done!!!!!!!! fab work is nothing i cant handle so it should make for a good project . is it worht it tho!! d&d u say hmmmm.... is it a good reliable setup or should i slap it together with a 300 or something ????????????

I say it is worth it. Last ride I went on I rode around in 2 lo, and when it came time to crawl I would first go into 4hi in second case, and see what happened, or if I wanted to do real technical double lo and pick a trans speed. You can literally pick 1,2, or 3rd gear and take off.

thanks for all the input and sorry for the late respone. theres only so many hours ina day lol!
Originally Posted by brookhart63 View Post
The guy on pirate's sig says the kit is no longer avalible.
The 231-231 has a great crawl ratio.
There are a few guys building the kits... check in vendors area, and search.
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Old 11-06-2011, 11:15 PM
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Hey guys. I just stumbled across this thread. After trying to get ahold of Duffy off and on for a couple months I decided to do the R and D to build my own. Since I already build suspension components and bumpers I decided this would be a good addition to my products. I posted up some details in my build thread too but here's a link to check out the setup more in depth.
http://naxja.org/forum/showthread.php?t=1073212

Also, if you are running a 231/231 combo you DO NOT have to flip the first case. If you want to run the 231/D300 combo then you would have to flip the first case because the D300 shifts out the front.

Last edited by Lead Foot; 11-06-2011 at 11:26 PM.
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Old 11-07-2011, 07:12 AM
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OK I am speaking from experience... YOu have to flip the front case if you plan on running the t-case flat, or close to flat. Also expect to run into shifter linkage issue.. I went with some home fab cable shifters.



Also if you are running a 231/d300 with it being a drivers drop.. you have a lot of other issues to address before you get to shifter linkages. .

Here is a pic of a 231/d300 You can see a lil better why you would have to flip it if you were running a drivers drop on it. Plans for this are to upgrade to 4 to 1 in the 300 as well as 32 spline outputs. It will also have triple sticks so I can do front digs with it

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Old 11-07-2011, 08:25 AM
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PingPong, How did you do the mounts? One at the end of the trans and another somewhere else? Ive seen people break a few cases from all that weight and torque moving stuff that shouldnt move.
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