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Old 01-24-2014, 11:08 AM   #21
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1966 26' Overlander
Phoenix , Arizona
Join Date: Apr 2002
Posts: 7,506
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Work on known issues then tackle the unknown. If the carrier bearing is iffy, it is after all 25 years old and exterior bolts directly to the vehicle. (Transmitting vibrations) A torn boot allowing dirt into the bearings can cause excessive wear. Or the drive line run out being excessive can take out a carrier bearing as well.

There is a run out spec for most drive lines. Since it sounds like you are in the Phoenix area I would recommend Dick's driveline. Dicks Drive Shafts I have used them for several cars to obtain replacement drivelines. I am sure they would know run out tolerances.

You could replace the carrier bearing and then find out the driveshaft is causing the damage to that bearing. Diagnosing the shaft is needed which may be what has been done already.

1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!
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Old 01-26-2014, 06:14 AM   #22
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1979 28' Airstream Excella 28
Commerce , Michigan
Join Date: Jun 2012
Posts: 30
You'll want to make sure its straight also --- no dog leg at the carrier bearing!
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Old 02-26-2014, 06:53 PM   #23
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1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
Posts: 1,212
Hi I'd like to report back with an update on the hunt for the vibes.
After getting the wheel ballencing , alignment , steering parts replacement done, There still remained an annoying vibration in the driveline.
I found a good family run machine shop that does mainly drive train work, driveshafts of all sorts.
Some of the problems they corrected were mid shaft needed an end cut off and rotated to get it into phase correctly, the rear shaft needed lengthening by 1.5 inches to get correct engagement to the splined shaft, all shafts needed ballencing, and both carrier barrings were replaced.

In other words the whole shooting match was done.
Well so far with just a short 15mi. test drive, this seems to have been a big step towards a smooth ride. :-)
It is interesting how solving one problem in this sort of assyembly will sometimes reveal another issue. I'm hopefully that this series of repairs will finally put the vibration issue to rest and let me focus on other parts of the coach for a while.

Oh. While waiting for the shaft work to be done, I replaced the power converter,
Wow, what an improvement , I can now use the dash stereo while pluged in to shore power with out the loud static noise that had been happening, also the performance of the television is way better, much clearer pic, and stronger signal, all the 12 volt lights in the coach seem a bit brighter. Nice unexpected bennifits.

Thanks to all here for the informed and helpful discussion.

Cheers Richard
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