How to upgrade a NP231 transfer case - JeepForum.com

 
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post #1 of 13 Old 01-09-2011, 09:39 PM Thread Starter
eak389
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How to upgrade a NP231 transfer case

I blew my NP231 in the last snow storm - What can I do in the rebuild to toughen it up for future wheeling/ towing (side note I have 33 upgrading to 35's soon)

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post #2 of 13 Old 01-09-2011, 09:55 PM
wushaw
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Remove it an install a 241OR or you could do the wide chain kit, or flipped dana 300 or Atlas II.
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post #3 of 13 Old 01-10-2011, 01:28 AM
RogueSpear2023
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Buy a rebuild kit and replace the chain with a wider stronger version. The NP231 is a strong transfer case, if took it out more than likely the chain was already stretched and finally just broke.

Max

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post #4 of 13 Old 01-10-2011, 07:54 AM
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SYE, wide chain kit, 6-planetary assembly. or you can buy a NP231HD.

www.jbconversion.com sells em.


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post #5 of 13 Old 01-15-2011, 04:13 PM Thread Starter
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I bought the wide chain kit - Now I'm curious what SYE - Do i have to replace my drive shaft and what shaft I should get? any thoughts?
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post #6 of 13 Old 01-15-2011, 04:16 PM Thread Starter
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Forgot also bought the 6 pinion planetary gear -
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post #7 of 13 Old 01-15-2011, 04:20 PM
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Quote:
Originally Posted by eak389 View Post
I bought the wide chain kit - Now I'm curious what SYE - Do i have to replace my drive shaft and what shaft I should get? any thoughts?
IMO Advanced Adapters and Tom Woods Combo, you can order right from AA's site. I have that combo, directions were great and AA's a proven manufacturer.

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Now don't be bringing logic into this
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post #8 of 13 Old 01-15-2011, 04:43 PM
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Quote:
Originally Posted by eak389 View Post
I bought the wide chain kit - Now I'm curious what SYE - Do i have to replace my drive shaft and what shaft I should get? any thoughts?
The link unlimited04 gave you to jpconversions, they have a super short SYE that gives you a lot of strength benefits. If you just look at their page they go into great detail about how much stronger their SYE is. It's def. the SYE I will be going with when the time comes.

http://www.jbconversions.com/product..._short_sye.php
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post #9 of 13 Old 01-15-2011, 06:39 PM
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Absolutely do the ultra short jbconversions SYE. The extra driveshaft length means much longer life for rear ujoints and more flex before driveshaft binding, in addition to the stronger build quality.

At the cost of the wide chain and 6 pinion upgrades... I'd have done the 241OR, in part for the 4-1 gearing.

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post #10 of 13 Old 01-15-2011, 06:45 PM
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Originally Posted by Boodyrider View Post
Absolutely do the ultra short jbconversions SYE. The extra driveshaft length means much longer life for rear ujoints and more flex before driveshaft binding, in addition to the stronger build quality.

At the cost of the wide chain and 6 pinion upgrades... I'd have done the 241OR, in part for the 4-1 gearing.
JB Conversions FTW. Best in the biz.

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post #11 of 13 Old 01-15-2011, 06:59 PM
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From another thread

http://www.jeepforum.com/forum/f46/c.../#post10575195


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post #12 of 13 Old 01-15-2011, 07:27 PM
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Originally Posted by Imped View Post
JB Conversions FTW. Best in the biz.
i installed the jb conversions super short and love it. I couldnt say its the best only because i never personally compared to any other . I say it would be hard to beat though. they also are right on point as far as pricing goes. Check out their website and look at the engineering that has went into them.
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post #13 of 13 Old 01-15-2011, 09:08 PM Thread Starter
eak389
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Thanks for the ideas -
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