I have a 1994 Ford Ranger 4.0L 5 speed. Until recently, the A/C cooled just fine. Now the air does not seem as cool as it should be. In the cool of the morning, it cools OK. In the heat of the day, when you turn the AC on, there is a noise (not quite a grind - maybe more of a wobble) as the compressor engages. Nothing in the front of the compressor feels loose. I had a friend who had gauges look and the refrigerant does not appear low (low pressure side).
Is this a symptom of the A/C clutch or compressor? Is it better to replace both?