Did someone else swap the NP242? 5.9 Zjs came with the NP249 AWD t-case from factory.
The shift gate in the floor of the ZJ is setup for a 3 position t-case(247, AWD(high), N and 4wd low.
The 231 has 4 positions, 2wd, 4wd(high), n and 4L.
The 242 has 5 positions 2wd, AWD, 4HI, N and 4l.
I've toasted two 242 in my ZJ as I've not been able to get the linkage setup properly. It goes into 4L and and wheels ok and then suddenly one day its 2L.
I put in a 231 but used the linkages from a 231, I think the shift tab bolted onto the t-case is a different length. Also might be pointed in different direction. Cann't remember, its been a while.
Send me a cell number and I'll snap a pic of my np231 setup and text it to you.
Here is a writeup I did that might help as well.
http://www.fourwheelstampeders.ca/forum/viewtopic.php?f=26&t=4603Search google, NAGCA and Mallcrawlin for more info.