For those TracKickVit and general gearheads out there, I have added a generic Gear Calculator to the Gear calculator page at Ack's FAQ.
The generic calculator allows you to plug in any differential, transfer case and transmission gearing value instead of selecting from a list of gears available for the Samurai.
the direct link is:
http://acksfaq.com/gearcalc/gearcalc-gen.phpEnjoy!