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Old 12-26-2020, 02:03 PM   #1
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Noise after 65 mph speed ???

New tires on, and I still have the same noise come in after 65 mph speed, it looks like the sound when you get a highway with treads, but unfortunately I don't need the threads to have the sound, before 65 mph is a total silence and I stay at 64 mph.

But still ask anyone have the same experience I got Michelins
on Fleetwood Flair 2001.



Just trying to be safe?

How to check the bearings, that is way to lubricate without major disassembling????

Thank you
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Old 12-26-2020, 03:10 PM   #2
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I'm sure you did but did you balance new Michelin tires.
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Old 12-26-2020, 05:14 PM   #3
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I had a similar experience. Sound would come on at about 50 mph. Sounded and felt like I was running snow tires, or the type used for off-road. Sound would go away when I was making long sweeping right turns. Turned out to be wheel bearings on the right side. Had both sides replaced and was amazed how quiet the ride became.

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Old 12-27-2020, 06:56 AM   #4
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Yes! I balance, and this noise I have before with the old tires.
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Old 12-27-2020, 10:31 AM   #5
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I think Bill probably nailed it!
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Old 12-28-2020, 10:20 AM   #6
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yep, have someone check front end play.
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Old 12-28-2020, 11:14 AM   #7
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I would also consider checking drive shaft and u joints.
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Old 12-28-2020, 12:27 PM   #8
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I had a similar issue on my 2000 Newmar and it turned out to be the drive shaft alignment was slightly off.
My noise started at 58 mph and was gone at 65 mph.
Just my $.02
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Old 12-28-2020, 07:09 PM   #9
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Quote:
Originally Posted by ShelbyTom1 View Post
I had a similar issue on my 2000 Newmar and it turned out to be the drive shaft alignment was slightly off.
My noise started at 58 mph and was gone at 65 mph.
Just my $.02
I guess this is a great possibility, do you mind to explain to me how I can check the alignment off my drive shaft.
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Old 12-28-2020, 07:19 PM   #10
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Quote:
Originally Posted by Dominiqueb View Post
I guess this is a great possibility, do you mind to explain to me how I can check the alignment off my drive shaft.
From my Monaco manual
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Old 12-28-2020, 07:32 PM   #11
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Quote:
Originally Posted by ShelbyTom1 View Post
I had a similar issue on my 2000 Newmar and it turned out to be the drive shaft alignment was slightly off.
My noise started at 58 mph and was gone at 65 mph.
Just my $.02
Great answer, this was the first thing I checked.

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Old 12-28-2020, 08:49 PM   #12
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Could be bent or out of balance, drive shafts have weights, could have fell off.
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Old 12-29-2020, 11:11 AM   #13
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Quote:
Originally Posted by Dominiqueb View Post
I guess this is a great possibility, do you mind to explain to me how I can check the alignment off my drive shaft.
Unfortunately I don’t know exactly as I had it done about 15 years ago at the Ford dealer as it was on the F-53 chassis
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Old 12-29-2020, 11:43 AM   #14
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Bring it to a decent mechanic. It is very easy to tell driveline from wheel as they turn at different speeds and the noises are of a different frequency.

turning left / right helps to determine wheel bearing noise. On / off gas is a good way to isolate driveline clunks.

Broken down rubber isolators in suspension allows noise transmission and amplification so "normal" noises are heard "abnormally". But that typically also causes sloppy steering and alignment pull issues and clunks especially on braking.

Driveshaft imbalances are felt as a low frequency rumble in your seat. Wheel bearings are higher pitch (but not high pitch). Lower with larger tires as they rotate slower for same MPH.

Locating the location of the source is easy when a "Chassis Ear" system is used https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
A helpful tool that is not very commonly known that can pay for itself the first time it is helpful.

A sound recording of the noise will definitely help an experienced "forum technician" to help further. The rest of the posts are good guesses based on limited information. But, if abnormal, my bet is on wheel bearings. the Chassis mike will help determine which side. A project I currently need to do on my wife's escalade...

Engineering labs look at oscilloscope traces of noises to isolate based on their noise characteristics to isolate "BSR" (Buzz / Squeek / Rattles). Even more advanced is injecting high frequency noise through a structure and recording the response back from the structure and recording "normal" vs. "abnormal" to find cracks or deformities. But that's a little beyond a DIY'rs tool box.

Good luck!
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