Whining sound when towing. Trouble? - Ford Powerstroke Diesel Forum
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Old 04-12-2010, 08:51 AM
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Whining sound when towing. Trouble?

When towing serious load with my '01, every 5-10 minutes of so I'll hear what sounds like a whine the increases in pitch, steadies out for a few minutes, then tapers off. There doesn't seem to be any loss in power. No smoke or any other odd behaviors when this happens. It doesn't sound like a fan due to the ramping/unramping of the noise.

Is this right? I've had this truck since new and put 300K miles on it & never heard this until I got an offshore boat to pull.

Should I be conserned?

Thanks!
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Old 04-12-2010, 11:12 AM
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Rear ends will tend to whine when they are on the way out.
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Old 04-12-2010, 12:09 PM
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Quote:
Originally Posted by coot1 View Post
Rear ends will tend to whine when they are on the way out.

It's definately not gear related. It's forward of the passanger compartment. I know gear whine, and this ain't it.

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Old 04-12-2010, 10:18 PM
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how much other towing have you done, is it turbo surge? it happens more under more load on the late 7.3s
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Old 04-13-2010, 06:04 AM
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Quote:
Originally Posted by countryraised View Post
how much other towing have you done, is it turbo surge? it happens more under more load on the late 7.3s
Done A LOT of towing. Mostly my FJ40 on a flatbed. The boat weighs a lot more and stands up in the wind, too. If I were guessing, it sounds like exhaust gasses. Certainly could involve the turbo. Could the exhaust temp be getting too hot and the wastgate is opening or closing? Guessing here...

Turbo surge is ratchety, right? This is definately a smooth roaring(like a fan) whine.
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