Transfercase Questions

SBpunk · Mar 26, 2016

1992 4.0 AX-15 NP231

First off not 100% sure what year this case is out of. I posted up some pics so hopefully you guys can help me out. Thinking is a NP242 from a 1996/97.

Question is with the short input shaft on the AX15 transfer cases would a medium input need to be swapped out or is there enough room in the Ax15 to run it without a problem? Ive read a little bit on it but nothing definitive. The case I have in the pictures came out of a 93 XJ but the shifter bezel was a 231. I'm pretty sure it was swapped in at some point.

trippled · Mar 26, 2016

Are you trying to swap to a 242? Look at Novak adapters they have a lot of info on what's needed for different tcase/trans combos.

SBpunk · Mar 26, 2016

Ive dug around on their website but was hoping to get some real live application on if a medium shaft fits into a small without damaging the transmission.

Johnnie Walker · Mar 27, 2016

Is definitely a later model r-case, as it has a sealed rear output shaft. Hoave you manually shifted and confirmed it is in fact an NP242? Should be 5 positions.
I see the medium input as a non-issue.

ehall · Mar 27, 2016

Its a 242 for sure, production date of 3/96

I can't answer about the spline length, never tried that matchup

foxwar71 · Mar 27, 2016

I put a later model 242 like that on the back of my 95 ax15 in my previous 2dr. No issue with the medium length shaft. That was a great setup :thumbup:

SBpunk · Mar 27, 2016

Thanks everyone. I measured the output shaft (I think) and it came out to be .750 so I might've been freaking out for nothing. The 231 I have in my jeep now is the tailbone type rear driveshaft. Hoping that isn't going to be an issue? Pretty excited since I've been looking for a 242 all winter. Picked one up from a WJ not knowing about the speedo gear. Fun times.

SBpunk · Mar 27, 2016

This part from where it meets the case to the end is .750. I didn't think they made any short input shafts on the later models?

Johnnie Walker · Mar 27, 2016

The sealed rear output is better in a lot of ways, including if you happen to lose a rear drive shaft. Makes it easier for Hack n' tap as well, as you do not need to seal the output.

SBpunk said:
Thanks everyone. I measured the output shaft (I think) and it came out to be .750 so I might've been freaking out for nothing. The 231 I have in my jeep now is the tailbone type rear driveshaft. Hoping that isn't going to be an issue? Pretty excited since I've been looking for a 242 all winter. Picked one up from a WJ not knowing about the speedo gear. Fun times.

SBpunk · Mar 27, 2016

Johnnie Walker said:
The sealed rear output is better in a lot of ways, including if you happen to lose a rear drive shaft. Makes it easier for Hack n' tap as well, as you do not need to seal the output.

Awesome now just saving up for the Novak shifter

Transfercase Questions

SBpunk

NAXJA Forum User

trippled

NAXJA Forum User

SBpunk

NAXJA Forum User

Johnnie Walker

Piece of Fish!

ehall

NAXJA Member

foxwar71

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SBpunk

NAXJA Forum User

SBpunk

NAXJA Forum User

Johnnie Walker

Piece of Fish!

SBpunk

NAXJA Forum User

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