I got Bentpart's 60k miles fan and clutch and installed it today.  After a 20 mile highway drive I let it idle for 25 minutes.  The temp gauge went to just shy of half way up at the max.  This weekend I have a wheeling outing at the Badlands ORP in Indiana.  That should be a real test.

The new fan clutch doesn't feel any different in the way it turns when cold than the old one did.  

Thanks to Mike for shipping it to get to me in 2 days!

Got back from a weekend at the Badlands ORP.  The Tracker did great.  The only difficulty it had was in ruts that where much deeper than my ground clearance.  I got stuck once in a big puddle in a big rut.  The temp gauge never went above half way.