Noise at 45-60mph

I have a 93 rodeo 3.2L V6 5-speed. I get this belt squealing/cat screaming sound that comes from either under the hood on the front passenger side or underneath the truck when I reach 45-60 mph. It does not happen everytime and once I take my foot off of the gas pedal it goes away. I had all the belts changed. I changed the front and rear differentials. Please Help!!!! It's driving me crazy. Thank in advance.

Tighten up your driving belts a tad more; Isuzu's like their belts really snug.

I tightened the belts up a litte more and still get the noise. Any other things that may cause this to happen.

I tightened the belts up a litte more and still get the noise. Any other things that may cause this to happen.

pullies, bearings, a stuck (and hot) cat.

is there any difference your first few minutes of driving vs after everything is heated up real well? any dif with or w/o ac on?

have you tried, can you duplicate this at in the driveway reving it up in neutral? even if not, you can use a hose in the ear, or long screwdriver as sound isolator/transmitter -- move it to touching different possibilities: ac compressor, power steering pump, alternator, fan 'tower'. . . you might be able to hear something even if it's not doing the screeching at the moment

//bc