m_gainey

Im not too good with transmissions and stuff in that category. Alright, my 1996 Jeep Cherokee has the NP231 transfer case. Could I use another transfer case out of a 1992 as long as its the NP231 or would it bolt up differently?

Bustedknuckle

Should bolt up fine. The only thing that I could precive being different would be the spline count or something along those lines. And what slip yoke were you planning on using.

m_gainey

heck if i know. i was just gunna trade my transfer case out with that one

Bustedknuckle

Lmao, go for it. Nah, if they are both infact NP231 (Command Trac) they'll both have the same 2:72:1 ratio, both use the same bolts, etc etc. They stayed the same from 87-01.

89Laredo

no, they didnt.

87-90 will have 21 spline input.
with any manual transmission it will have a 23spl input.
You want a 92+ 231 from a 4.0/auto.

Bustedknuckle

I stand corrected.

xjmarc

They also used 3 different spline lengths.

sycoglitch

One thing with the older jeep TC case is the slip yoke. I forgot what year they changed it but from like 95 and on they used flexible slip yokes and earlier models used metals sye. This might make a difference. Someone with an older model xj should be able to confirm this or not.

XJx3

I know they use different length splines. The driveshaft from my 92 fits in the 87 but the slip joint is too long by a half inch to an inch. There is no "slip" at all and the 87 is lifted 4" Spline wise they are the same.

BTW, if anyones looking for a trans and transfer case I have a a spare pair out in the shop.

xjmarc

I was referring to spline lengths on the transmission.

m_gainey

so its a no go then?

xjmarc

Good chance it would work. Both should be 23 spline and if you're lucky the length will be the same. Most autos used the same length.

m_gainey

Alright sweet. So what if the lenghts are different?

xjmarc

You can swap the inputs. If they are both Cherokees good chance they'll be the same.