 93 Ranger overheating
okay guys, here is what i have. i have a 93 ranger 3.0L engine and my problem is overheating. when driving in normal city traffic, the truck runs fine and not hot at all by the guage or the feel of the radiator cap. but when driving on the highway for any distance, the truck runs hot according to the guage and the cap of the radiator. any ideas why this may be and how to correct this problem? | 
