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Go Back > Reviews > Transfer Case > Transfer Cases > New Process NP 231

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New Process NP 231

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Product Information

MSRP: $749.00
Average Price: $11,579.67
Manufacturer: New Process
Yes: 96 / No: 7

AKA NP 231 J


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Registered User
TennesseeTJ02's Reviews
02-02-2010, 02:50 AM
Price: $400.00
Pros: It is a good TC
Cons: nothing yet
Recommended? Yes

Comments: It is a good transfer case.

Registered User
clety's Reviews
01-15-2010, 09:07 PM
Price: $1,200.00
Pros: good
Cons: ehh not sure yet..
Recommended? Yes

Comments: these will take a beating and keep going my last was full of mud and no fluid and still did not blow out... it was like that for at least 4 months till i put a new one in..

Registered User
UltimateCC's Reviews
11-26-2009, 01:01 PM
Price: $1.00
Pros: Does what it supposed to
Cons: N/A
Recommended? Yes

Comments: Does the job

Registered User
87blackjeep's Reviews
11-26-2009, 01:09 AM
Price: $450.00
Pros: nice T-case
Cons: none yet
Recommended? Yes

Comments: just an all around nice T-case so far!!!

Registered User
98XJ's Reviews
11-11-2009, 02:37 AM
Price: $1.00
Pros: came with the car
Cons: came with the car
Recommended? Yes

Comments: came with the car


Registered User
justin816's Reviews
11-11-2009, 02:13 AM
Price: $260.00
Pros: So far so good no prob
Cons: looking every weekend
Recommended? Yes

Comments: So far have found no problems. Had a friend freshen up after motor work and no prob yet!

Registered User
Jsplurge's Reviews
11-06-2009, 05:28 PM
Price: $1.00
Pros: Works
Cons: There is better out there.
Recommended? Yes

Comments: Work for what I do with it, stop, shift, mud! Haha.

Registered User
Boodyrider's Reviews
11-01-2009, 01:11 AM
Price: $1.00
Pros: swapped mine for one with a SYE
Cons: no 4.0 range
Recommended? Yes

Comments: If I didn't have the SYE on mine, I'd possibly have upgraded by now. But for a stock Tcase, it does the job without complaint so far.

Registered User
perndawg's Reviews
10-07-2009, 04:21 PM
Price: $1.00
Pros: I heard it was strong.
Cons: It came with my stock 4 banger 3 speed auto SE TJ.
Recommended? Yes

Comments: It handled all I could give it from my tired 180K mile 4 banger that HAD 180 HP from the factory. It must have only had 80HP by the time I got my hands on it. I'm about to put rumor to the test. I've not got a 340 HP 5.7L Hemi going through a 45RFE 4 speed auto tranny to the NP231. I'll see how strong it really is.


Registered User
cubewhiz's Reviews
09-28-2009, 04:14 PM
Price: $1.00
Pros: None
Cons: None
Recommended? Yes

Comments: It does what it needs to. It came stock on my YJ when I bought it. I may eventually replace it with something nicer, but for now, there is no need.


Registered User
valacech's Reviews
09-15-2009, 11:49 AM
Price: $1.00
Pros: It works.
Cons: None.
Recommended? Yes

Comments: It came with the truck.

Registered User
Mediarocker's Reviews
08-29-2009, 03:11 AM
Price: $1.00
Pros: Its a Transfer Case
Cons: Rocks are NOT your friends, No 2LO
Recommended? No

Comments: Came stock. Switching it out for an Atlas sooner or later.


Registered User
PackDude's Reviews
08-16-2009, 11:48 PM
Price: $1,025.00
Pros: Heavy duty chain and gears All new parts
Cons: No "2 low" mode
Recommended? Yes

Comments: I decided to get a SYE to correct the slight vibes in my drive shaft since doing a 2" OME lift. But since the SYE kits by themself are upwards of $300, I figured what the heck, spend another $600 and get a heavy duty NP231 to boot.

Researching the various options, it looked to me like the JB Conversions HD NP231 with their super short SYE was the way to go. It's got a wider chain, a planetary gear with 6 helical gears instead of 3, and all the parts are brand new, not refurbs.

The folks at JBC are very professional and had the unit built and delivered within a few weeks. The unit was packaged very well for the several thousand mile freight trek from Louisiana to Washington State.

So far, no leaks or anything. It bolted right in, and worked from the get go. It came from the factory with the studs attached in a ziploc bag. The studs are kind of hard to install, but I guess they didn't want them poking holes through the shipping crate or getting bent in transit.

I will give the transfer case a 5 star rating unless something happens to it! I am planning to install a Super 35 30-spline rear axle with Detroit locker, and an upgraded front differential, so my Jeep can actually handle what this transfer case can dish out.


Registered User
iowaneedshills's Reviews
08-05-2009, 11:43 PM
Price: $0.10
Pros: came with the jeep, hasn't broken yet
Cons: slip yoke, chain drive, 2.72:1 Low range, Gear driven speedometer signal
Recommended? Yes

Comments: This is the transfer case that comes in about every jeep. Works pretty well.

Registered User
Oaktree's Reviews
07-29-2009, 08:31 PM
Price: $300.00
Pros: pretty much a stock transfer case.
Cons: nothing is wrong with it
Recommended? Yes

Comments: its alright. the NP 231 is pretyt much the stock transfer case that a wrangler comes with.

Registered User
dajeepman's Reviews
07-26-2009, 12:33 PM
Price: $1.00
Pros: It came with the JEEP
Cons: Not low enough stock
Recommended? Yes

Comments: This is the Factory T case that comes with most XJ's

Registered User
kurt13r's Reviews
07-15-2009, 06:54 AM
Price: $700.00
Pros: Works like it should
Cons: ?
Recommended? Yes

Comments: Never had an issue putting it in 4x4. Works good.

Registered User
skip-yj's Reviews
07-01-2009, 09:11 PM
Price: $111.00
Pros: never failed me. and easy to take apart
Cons: ......
Recommended? Yes

Comments: very good. and veerryyy universal. never failed me.


Registered User
compcrasher86's Reviews
05-18-2009, 11:07 PM
Price: $1.00
Pros: Its pretty sick and shifts really well, 4low sounds and feels great. Good to be able to switch into 2wd when you need it
Cons: No 4wd Fulltime so you absolutely can not use 4wd on dry paved surfaces, and unlike the QD in the new Jeep Grand Cherokees, it is hand shift and not electric shift... but hey, its a Jeep, make a sacrifice for many benefits
Recommended? Yes

Comments: I like it alot but I miss the 242 that I had in my ZJ because this one can only use 4wd as you need it and will not automatically kick in like the 4fulltime on the ZJ does. Oh well, its a Jeep


Registered User
Dmax5er's Reviews
05-17-2009, 11:10 AM
Price: $3,000.00
Pros: Built heavier than stock.
Cons: none yet
Recommended? Yes

Comments: bought with my trans as a kit from mantrans, its is now a NP231JHD and working great .

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