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Old 11-20-2007, 01:00 PM
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Unhappy Suspicions noises

I have a 99 2wd f-350 crew cab dullie that I use to pull my 5th wheel. It has about 154,000 miles on it. the first suspect noise is when I am on a long up hill or very windy pulling it drops out of OD and makes this jet engine noise that kind of surges up in down. upshifting back into OD makes it go away. I think it may be the torqe converter related.

The second noise is when I am at about 75 - 78 mph and about 2400 RPM. The turbo (I'm Guessing) makes a loud ringing noise. I reduce RPM and it quits. I believ both are not good Please let me know what you think they might be.

I have also recently noticed a new smell after driving about 5-6 hous that smell like burning powersteering fluid. Currently no leaks that I can see and all fluid levels are good.

I have also been averaging about 15 MPG if this helps it does have low gear ratio or tow package.
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Old 11-21-2007, 04:52 AM
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The first noise is your clutch fan engaging, it does sound like a jet airplane taking off, it will come on real low and speed up or come on like gang busters depending on engine temp. It will scare you the first time you hear it. Perfectly normal!!

The second sound sounds like turbo surge, some of gotten lucky and the WW has fixed it, other than that the only for sure cure is the ATS housing. Good luck.
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Old 11-21-2007, 05:24 PM
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I am not sure that it is the clutch fan because it is not a constant sound. It sounds like Wheeeeee Whooooooo Wheeeeeee Whoooooo and it is very loud.
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Old 11-22-2007, 03:16 AM
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The clutch van is a variable speed fan, it will come on slow and get louder or all at once, if you were toting a load up a hill working the engine this is what it was, I assure you, the fan is so efficient mine has only stayed on for a few seconds (maybe 10 at the most) and then shuts off, it moves a lot of air and once the temps drop below a certain temp (180?) it shuts off.
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