jeep cherokee trans swap!!

i have a 1987 jeep cherokee with the 4.0 and the BA10/5 - 5 speed manual and from what i have heard its shit!! well i found a aw4 cherokee trans for cheap with low miles! my question is what do i have to do to swap the aw4 auto into my cherokee??

search it there is alot more than this type in peugot heres one of the bigger one's
http://www.naxja.org/forum/showthread.php?t=70388&highlight=peugot