Very slight hum on acceleration 2000 GC
 

Fellas, I gave my 93 grand Cherokee to my brother, and picked up a 2000. The mileage was close to the same on both vehicles(around 165k), and I like them both. On my 2000 model I hear a slight hum that I can notice at higher speeds. I get it more upon acceleration, when I let off the gas it stops. It's actually noticeable on a few mph increase when I accelerate.... I went through a few older posts but couldnt get ny clear direction to start with...many thanks