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legryz · 09-27-2011, 07:54 PM

Hi Guys,

On our last couple of trips in the MotorHome, (2002 F53 chassis, V10, 4r100 trans.) I'm hearing a high pitched sound, (something like a storm siren), between the speeds of 30+ and 40 mph. A mechanic friend of mine says transmission (clutch drum) What do you think?
I'm pretty much finished for the season with camping but if it's something like a transmission that needs to be worked on I'd like to get it fixed before I'm stuck on the side of the road somewhere.

LVJ58 · 09-27-2011, 08:10 PM

Is it a different sound than when your cooling fan clutch engages? The cooling fan on ours has a higher pitched sound when it engages.

If your transmission shifts normally I would doubt if that's the source. Another possibility could be the rear differential, I have read posts in the past where folks have complained of differential whine on the f53 chassis.

Let us know what you find out and good luck.

legryz · 09-27-2011, 09:00 PM

It is definitely not the fan clutch and I don't think it's the diff. As the only time I hear it is between 30/40 mph. It' s also there when I take it out of OD.

sc3283 · 09-27-2011, 11:07 PM

Did you have a recent windshield replacement or add anything to the outside of the coach?? (ie: antenna, sat dish, awning)

many times we don't think of recent additions/repairs that may be effected by wind when traveling

Midniteoyl · 09-28-2011, 01:43 AM

Quote:

As the only time I hear it is between 30/40 mph. It' s also there when I take it out of OD

Are you saying you can take it out of OD at any speed and hear it?

Where does it sound like its coming from? It could be just about anything, from the accessories, belts, torque convertor, tranny gears, drive shaft, u-joints, rear diff, etc.. anything that could set of a resonance...