I have a buddy who I have sold a jeep cherokee to. When I sold it to him I included an ax-15 and matching np 231 out of my 90 wrangler. The cherokee is an 87. He is having a problem getting the tranny mount to work with the crossmember. When he talked to a wrecker they told him that putting an ax-15 into an 87 couldn't work because the bellhousings wouldn't match. Well he has the tranny in and it all fits. The only problem is the crossmember to mount issue. I am long winded, sorry. To get to the point, is there any reason an ax-15 won't work in an 87 cherokee with a 4.0 when the ax-15 came from a 90 wrangler with a 4.2. When I pulled the t-18 from the cherokee and put it in the wrangler I didn't have any major problems so I would expect it to be the same going the other way. Any input would be great. I recognize the inherent problems of linkages, mounts, etc. I am only asking about gearing, teeth, housings, etc. Thanks.