xj 231 vs. yj 231 ?

sass · Mar 31, 2006

The transfer case in my 94 xj is about shot and I have found one for sale, but it is for a yj. He says the spline count is 23 just like mine. Are there any differences? Will it bolt up correctly?
Thanks SASS

langer1 · Mar 31, 2006

sass said:
The transfer case in my 94 xj is about shot and I have found one for sale, but it is for a yj. He says the spline count is 23 just like mine. Are there any differences? Will it bolt up correctly?
Thanks SASS

Could if both transmissions are the same.

sass · Mar 31, 2006

Well, his was a 5 speed manual and mine is a auto.

sass · Mar 31, 2006

Any definite answer?

Lodi Jim · Mar 31, 2006

As you stated, spline count is the same, at 23.
Direct swap as long as spline counts are the same.
HTH

xtrm4x4wanab · Mar 31, 2006

theyre both model# NP231J so they will line up perfectly. make sure they both have the same input splie count. some came with 21 spline input and some with 23 spline input. information on which spline count came with which tranny in which years is few and far between and at best sketchy. just count em by hand to be sure.

xjbubba · Mar 31, 2006

I'd suggest comparing the amount of shaft "stick-out" for each transfer case, as well as spline count. It varies with application. If it's different, you could always swap the input shaft and front bearing from your current xfer case to the YJ's case. That's how the factory "adjusts" each xfer case for a specific application on the NP/NV 231's.

RCP Phx · Mar 31, 2006

xjbubba said:
I'd suggest comparing the amount of shaft "stick-out" for each transfer case, as well as spline count. It varies with application. If it's different, you could always swap the input shaft and front bearing from your current xfer case to the YJ's case. That's how the factory "adjusts" each xfer case for a specific application on the NP/NV 231's.

X2
Spline length does vary between the different trans used.

87manche · Mar 31, 2006

http://www.novak-adapt.com/knowledge/np231.htm
That has the years and trannies with what input shafts they used in a table, bout half way down on the right side of the page.
HTH

xj 231 vs. yj 231 ?

sass

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langer1

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sass

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sass

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Lodi Jim

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xtrm4x4wanab

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