Originally Posted by AllMudd
The 2.5L came with the AX5, the 4.0 later years can with the BA-10, earlier years can with the AX15. And no not a direct swap from the 5 to 15.
2.5- ax-5 all years
4.2- 87-early 89 Ba-10, late 89-90 ax-15
4.0- ax-15 all years
You have to get a adapter plate to swap the ax5 to ax15, and its worth it, you might end up rebuilding that ax5 and loosing 5th gear in a month cause its crap.