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Old 01-05-2015, 04:47 PM   #1
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vibration and stabilization

I just picked up a 2009 Allegro 35QBA. It has 27k on the clock.
Since I am new to this, I have a question about the vibration level. I am an auto/aviation mechanic, so I have a pretty good knowledge base on some mechanical stuff. Seems that this unit picks up a "rumble" from about 25mph through cruising speed. It does not change with engine speed or load, just forward speed. It seems to get a little less obvious the faster I go, but it is still there.
Second thing, is there any aftermarket fix for controlling body roll??

Thanks

Milton
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Old 01-05-2015, 04:50 PM   #2
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I'm thinking flat sided tires from sitting too long. As the tires heat up(warmer weather) it may go away as the tires round out. Can you report on the "born on date" of the tires?
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Old 01-05-2015, 04:57 PM   #3
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Quote:
Originally Posted by Steeler34 View Post
I just picked up a 2009 Allegro 35QBA. It has 27k on the clock.
Since I am new to this, I have a question about the vibration level. I am an auto/aviation mechanic, so I have a pretty good knowledge base on some mechanical stuff. Seems that this unit picks up a "rumble" from about 25mph through cruising speed. It does not change with engine speed or load, just forward speed. It seems to get a little less obvious the faster I go, but it is still there.
Second thing, is there any aftermarket fix for controlling body roll??

Thanks

Milton
sumo springs...


Putting sumo's on the new ford f53.. Worth the look...
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Old 01-05-2015, 04:57 PM   #4
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I would bet late 2008 or early 2009.
I drove it 250 miles home and there was no change, good or bad.

Milton
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Old 01-05-2015, 04:58 PM   #5
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Old 01-05-2015, 05:01 PM   #6
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Old 01-05-2015, 05:04 PM   #7
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Old 01-05-2015, 06:52 PM   #8
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Quote:
Originally Posted by Steeler34 View Post
I just picked up a 2009 Allegro 35QBA. It has 27k on the clock.
Since I am new to this, I have a question about the vibration level. I am an auto/aviation mechanic, so I have a pretty good knowledge base on some mechanical stuff. Seems that this unit picks up a "rumble" from about 25mph through cruising speed. It does not change with engine speed or load, just forward speed. It seems to get a little less obvious the faster I go, but it is still there.
Second thing, is there any aftermarket fix for controlling body roll??

Thanks

Milton

Could be a universal joint/ carrier bearing on the drive shaft.


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Old 01-05-2015, 07:22 PM   #9
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My vote is U-joint or wheel bearing.
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Old 01-05-2015, 07:29 PM   #10
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Try applying the brakes while on the gas to see if the noise changes. If it does it could be a sticking caliper or wheel bearing.


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Old 01-05-2015, 07:32 PM   #11
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Could have been towed and drive shaft replaced out of phase. Ujoints need to line up.
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Old 01-05-2015, 08:11 PM   #12
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Hey, Thanks!

Looks like the easy thing to do is look at the U joint alignment and if it is like my first car (64 Impala) should be able to shake the hangars.
Next, jack the 2 front corners and spin the wheels. Then, off to tire balancers.

Thanks again.

Milton
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Old 01-06-2015, 01:00 PM   #13
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vibration

Think I found it.

Got under the coach and found the first hangar bearing looks like it got whacked.

Thanks all.

Milton
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