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Old 08-28-2018, 06:24 AM   #661
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Originally Posted by JDOnTheGo View Post
Thanks to all for the thoughts on the vibration. I'm afraid it is not a simple/obvious problem as some really good tire shops have seemingly pulled out all the stops to fix it. No luck.

I have four more steel wheels to replace with aluminum. I have fairly low expectations but maybe... Not sure when I'll get around to that.
Hey, you've got one of those GoPros.... zip tie the hell out of it to the underside of the bus and drive it around the block. Might take you a dozen laps to get the camera pointed the right direction but if you don't have anything else to do and the vibration is that bothersome...
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Old 08-28-2018, 09:20 AM   #662
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Oh trust me... I've tried that too. Only tried a couple of positions though. It revealed nothing. I might be motivated to try it again now that I have a second opinion that it is coming from the rear.
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Old 08-28-2018, 10:34 AM   #663
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Join Date: Oct 2016
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Year: 1999
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
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Originally Posted by JDOnTheGo View Post
Oh trust me... I've tried that too. Only tried a couple of positions though. It revealed nothing. I might be motivated to try it again now that I have a second opinion that it is coming from the rear.
Draft someone to follow along side and behind. See if they can spot anything.
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Old 08-28-2018, 10:57 AM   #664
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You could also download an accelerometer app for your phone and compare the frequency of the vibration to the calculated rpm of the tires. If it matches, you know that the culprit is the tires, hubs, half shafts, or differential cage, Anything coming from the driveshaft or pinion will have a frequency 4x to 5x (depending on your diff ratio) of that.
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Old 08-28-2018, 11:03 AM   #665
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In my experience where you likely think the noise/vibration is coming from, it could actually be the opposite end of where you think you hear/feel it.
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Old 08-28-2018, 11:08 AM   #666
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Quote:
Originally Posted by JDOnTheGo View Post
Oh trust me... I've tried that too. Only tried a couple of positions though. It revealed nothing. I might be motivated to try it again now that I have a second opinion that it is coming from the rear.
Did you have the front tires checked on the drum too?

Part of the wild goose chase I went through was caused by the wrong assumption that the vibration came from the rear (no wiggle of the steering wheel) when in fact one of the steer tires was out of round.
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Old 09-30-2018, 06:42 AM   #667
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I've been busy so slow to update... apologies... The Far East Trip is complete and we're back in the southwest!!

The total number of miles traveled was 4,125. I didn’t do a very good job keeping track of total fuel consumed but I frequently checked mileage at fill ups and it typically hovered around 7.5 mpg. I generally drove faster (about 65 mph) than I wanted as the annoying vibration was slightly less annoying at that speed.

I stopped at a CAT scale in Minnesota and it reported 42,000 lbs for the coach plus 4,000 lbs for the Jeep.

We stayed at far more “RV Parks” than we are accustomed. Overall, I was satisfied with the places we chose. Nothing fancy, of course, but all were very clean, quiet, and had some room to stretch. Well, mostly. One in Minneapolis just barely had enough room for Missy to get thru but the actual parking spot was just fine. The reason for staying at RV parks while enroute was the heat and humidity! I needed shore power to run the air conditioning.

It was a good trip but I am happy to be "home."

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Old 10-01-2018, 08:34 AM   #668
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Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
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The reason for staying at RV parks while enroute was the heat and humidity! I needed shore power to run the air conditioning.
Note to self: solar system needs to be large enough to run AC indefinitely. Check black market prices for kidneys.
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Old 10-01-2018, 11:47 AM   #669
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Yes indeed!

Additionally, holding tanks should hold enough to never need filled/emptied!!
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Old 10-02-2018, 08:10 AM   #670
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Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
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Yes indeed!

Additionally, holding tanks should hold enough to never need filled/emptied!!
Storm drains... wait, did I just say that out loud?
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