The 32RH is the TF999 used in TJs w/ the 4.0. An aw4 will work and be the simplest but it will need to be wired ;(
Check this out, it may help.
http://www.stu-offroad.com/engine/aw4/index.htm
Someone also makes a standalone wire harness for the aw4, i just cant remember who makes it.
