grizzlypaugh

Ok, so this is the story, I have a 96 cherokee 4.0 ho auto, it had a np242 it went out, so i went and bought a 87 np231 for $60 figure out the input splines are 21 and mine is 23. so i went and found a 2002 242j for $75 correct spline count and swapped it in and the shifter is all wrong cant figure out which way is 4x4 or 2wheel. So my question is now can I take the input shaft out of the 242j or np242 if not damage and swap it into the np231. Cause the 242j is not workin and i have no speedo now and the rubber deal on the out put shaft got ate up and it leaks. now i have really no more money for t-case's so if any of you guys know if i can swap the input shafts around it would be great.

sportrider

I can't help with the input shafts but, if you jack up one of the front tires you can turn the front driveshaft and see if your in 2wd or 4wd

EDIT: the output shaft seal is only $6.00 +or- at autozone

grizzlypaugh

well thanks man, im currently more interested in if i can swap the input gears.

captainwoot

Look up FRANKZ on here maybe he can help out, he has had a few good tcase write-ups

grizzlypaugh

okay will do thanks

posjeepxj

you can swap your tcase iput into the 87. the 87 has the vaccum stuff on it im assuming. and you wont have the electric to turn on your 4x4 light but it will work

zj guys have alot of good input on this casue to sway a 231 into one of there rigs they have to use their 249 input. so try searching 231 into grand swaps and should give you a good idea

grizzlypaugh

huh okay i will look it up, i just read that you cant cause in the earlyer cases the input shaft has different gear pitches.

1988cherokee

the NP231 and NP242 are different, your best bet is to jack the front end up with the 242 in and unhook the transfercase shifter lever and move the transfercase lever to figure out where 2 wheel and 4X4 is if all else fails I have a 23 spline input shaft that will fit the np231 if ya want it

grizzlypaugh

what does 249s come in? well i dont think it will work the same as using my 242.

1988cherokee

NP249s are the full time 4x4 transfercases used in grand cherokees

grizzlypaugh

well huh then the t-case out of a 2002 grand cherokee be a 249? cause i swear mine says 242j or are they the same? and is there 231's wit 23spline count?

1988cherokee

I dont remember what all grands used the NP249 I know the V8s did and there are a lot of 231s with 23 spline im actually suprised you found a 21 spline. My jeep uses a 21 spline and when it came time to replace mine all i found were 23 spline so i just swapped out imputs so it would work for me

grizzlypaugh

yea over here it is hard.

posjeepxj

91 and older have 21 spline, 92 and up have 23 spline

grizzlypaugh

welli got it rolling it dont have a front shaft right now and i am running smaller tires. just gonna run it for now hopefully get it fixed sometime later.