I've just picked up a 2004 4.4 with 100,000miles on the clock and am going to try my damnedest not to have to post about my tranny leaving itself all over the freeway........

so I'm planning on replacing as much as I need to mechanically and I know that I could replace EVERYTHING I think that's a little extreme. So I'm open to suggestions on what would be good things to replace that could cause a sudden and catastrophic failure of the engine/drivetrain. Things that I can hear coming (Wheel bearings etc) not so concerned about

My current list includes

Water Pump
Thermostat
Valve Cover Gaskets
All belts