How can I tell if fan clutch is OK or needs to be replaced?

OK I did not see any oil leaks at the clutch. The fan is not tight but maybe is alittle loose. When I compare it to the clutch on my big pick-up it spins easier, but the big pick-up has a power stroke diesel so I don"t know if the two can be compared or not. The fan in the ranger has alittle wobble to it when I wiggle the fan blades from side to side. Should I be replacing the fan clutch,or maybe start with the thermostat first. Thanks.

Which engine is it? I would think thermostat first...purge the air out of the cooling system, and then recheck.

It is the 2.3 liter engine. I think I will start with the thermostat first. Thanks again.

Yes, good call; do advise.