I have a 2001 Ford Ranger,V6,2WD,manual transmisson.For the past 2 weeks I have had a vibration I can't seem to pinpoint. I have had the ball joints,U joints and wheel bearings checked. The past couple days when I change gears between 1st-2nd and 3rd-4th I hear a clunking noise when I let off the clutch. I have also heard this noise once or twiceupon accleration. The vibration seems worse when I am in OD. Someone told me it may be the carrier bearing. What is the carrier bearing and is it hard to repair?

 

Catalitic converter and 02 sensor. NO long trips.