fan belt squeal? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dsy1 · 02-15-2011, 08:23 PM

All is fine until I get to about 2800 RPM on the highway, then I get a loud squeal that I assume is from a fan belt. I have tightened both belts (one for alternator and one for power steering) but it didn't solve the problem. (I know the expensive solution is to get an overdrive transmission so I don't need to run at 3000 RPM, but with 4.11 gears and a non-overdrive TH350 I have to work with what I have).

Next step is to remove one belt at a time to try to find out which one is making the noise. Both the water pump and alternator are new, so it should not be shaft/bearing problems. Any other ideas?

02-15-2011, 08:23 PM	#1
dsy1 Registered User Join Date: Aug 2010 Location: San Diego, CA Posts: 128	fan belt squeal? All is fine until I get to about 2800 RPM on the highway, then I get a loud squeal that I assume is from a fan belt. I have tightened both belts (one for alternator and one for power steering) but it didn't solve the problem. (I know the expensive solution is to get an overdrive transmission so I don't need to run at 3000 RPM, but with 4.11 gears and a non-overdrive TH350 I have to work with what I have). Next step is to remove one belt at a time to try to find out which one is making the noise. Both the water pump and alternator are new, so it should not be shaft/bearing problems. Any other ideas?

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