1992 explorer overheating

Our explorer is overheating we replaced the thermostat flushed the radiator and replaced the coolant it is still overheating. It is worse when we are in town. I'm down to thinking it could be the drive belt, or the fan anyone have any ideas? :feedback:

Have you checked the fan clutch? The fan has like a hydraulic damper in the fan that allows it to float at higher engine speeds etc. I have heard of the clutch going bad causing the vehicle to overheat in stop and go traffic.