Originally Posted by fruitlandgreer
I am fairly new to Jeeps and I got some great replys to the question of what is wrong with my transfercase, but I have one more. Can I replace my 249 with a 231? I have one handy and free so that is why I ask. Please help.
the answer is a conditional yes. some zj's had front driveshafts with a cv joint at the tc, you would need a new front shaft(or just a new end put on it) and very likely lengthening of the rear shaft as well.
but the swap it's self is failry straight forward following the instructions for a 242 swap. you'll likely need to swap the input from the 249 to the 231 unless you get really lucky and both are the same length.