What Do I Need To Do When My 2005 Ford Explorer 4x4 Hits 100,000 Miles?

Trade it in for a chevy...you don't say if it a diesel or a gasoline engine...i would say a complete tune up and maybe if needed include replacing the timing chain. Oil change,radiator flush ,grease all the joints(where ever a grease fitting is).transmission fluid and filter change, have tires inspected rotated and balanced,do or have a inspection of the chasis from bumper to bumper...change air filter if not included in tune up..oh! And check grease/gear oil level in the rear axle(pumpkin)..that's about all i can think of off the top of my head...oh! One more thing if you plan on keeping the truck/sport utility and your warranty is about up buy and extended warranty for at least the drivetrain including the coolant system..