I have a fdii, and when I off road, the bld's kick in often. The fdi have blds, it is a lot more aggressive on a fdii. Can a fdi have it be added? No. At least not without paying somebody buckets of money to break Chryslers ecu code and reprogram your patriot. What kind of off roading do you plan on doing? I knew I would be pushing the limits of my patriot, and wanted to have the most capable one I could get.
the cvt is actually just fine. Reliable, smooth, and actually effective off road.
1989 Cherokee Pioneer
http://goo.gl/OspLWH - amazon link