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  #16  
Old November 17th, 2018, 06:34
Jim Malcolm Jim Malcolm is offline
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Re: AX-15 + NP-242, Revisited

One thing to keep in mind is that the front output on the NP242 sits back about 1/2" from where it does with a NP231. I had to get a longer driveshaft due to fixed length LCAs at a relatively low lift height.
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  #17  
Old November 17th, 2018, 15:57
fetishfrog fetishfrog is offline
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Re: AX-15 + NP-242, Revisited

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Originally Posted by Jim Malcolm View Post
One thing to keep in mind is that the front output on the NP242 sits back about 1/2" from where it does with a NP231. I had to get a longer driveshaft due to fixed length LCAs at a relatively low lift height.
I am considering a swap to a 242. How high is your lift? I am on up country springs.
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  #18  
Old November 23rd, 2018, 03:55
Jim Malcolm Jim Malcolm is offline
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Re: AX-15 + NP-242, Revisited

Apologies for the delay. I'm at about 3.5" with IRO fixed LCAs, adjustable UCAs.
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  #19  
Old November 26th, 2018, 20:24
fetishfrog fetishfrog is offline
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Re: AX-15 + NP-242, Revisited

No worries at all. Thanks for the reply.
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  #20  
Old November 18th, 2019, 17:12
Xjmo99 Xjmo99 is offline
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Re: AX-15 + NP-242, Revisited

Just swapped the my np231 with a np242 on my 99 xj 5 speed ax-15 transmission. It can be done.
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  #21  
Old November 18th, 2019, 17:18
Xjmo99 Xjmo99 is offline
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Re: AX-15 + NP-242, Revisited

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Just swapped the my np231 with a np242 on my 99 xj 5 speed ax-15 transmission. It can be done.
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  #22  
Old November 18th, 2019, 17:18
Xjmo99 Xjmo99 is offline
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Re: AX-15 + NP-242, Revisited

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  #23  
Old December 9th, 2019, 10:22
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thechief86 thechief86 is offline
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Re: AX-15 + NP-242, Revisited

I ran the ax15 with a 242 for a few years on my first xj when I kerploded my 231. It worked fine, and between the 242 and the lunchbox locker in the rear, I never really noticed anything excessive beyond what I was already used to.
I had a 4.5" lift with 32's and a t-case drop spacer.
I kept that transfer case for about 5 years before I sold the jeep, and drove it all over the country, wheeled the piss out of it, and eventually my transmission stuck in 4th gear, and I could never get it to come out before I just sold the jeep.
I doubt the tcase had as much to do with the failure as much as hundreds of thousands of miles and years of heavy abuse did. Anybody who knew me during the ownership of this poor Jeep knew it was well loved, but treated like a rented mule.
I didn't like the 242 with the 5 speed as much as I did with the aw4 in another jeep, as far as snow driving went. The auto just made it a seamless action, which I had to try too hard to replicate while rowing my own.

YMMV.
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  #24  
Old December 24th, 2019, 00:51
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xeroOTG xeroOTG is offline
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AX-15 + NP-242, Revisited

I run a 242 behind my TDI/nsg370 combo, and before that behind an ax15/4.0 for quite a while too. I wouldn't have it any other way. It's got some shudder under acceleration if you launch it just right, but the additional traction is real.

I put a tom woods HD SYE and zj front output in mine, which means every single component of my 242 is stronger than the 231 that came out. That means I've got 32 spline yokes, previously the weak point of the 242 was the rear output shaft had a neck down for the speedo drive. The 242HD in some WJs has a similar 32 spline output and has a wider chain. These boxes are tough as nails, and that's why the second digit in the model number is a 4 and not a 3.

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