Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-03-2010, 11:11 AM   #1
Junior Member
Join Date: Jun 2010
Posts: 3
RV shakes from 55 mph- 65 mph

I have a 1976 Yellowstone on a Ford chassis, at 30mph I have a very slight shimmy throughout the whole RV, this happens again and more aggressively at 55mph and continues to 65mph. At 65mph it then goes back to the slight shimmy that happens at 30mph. When I purchased this RV it had new tires put on but the previous owners hadn't had them balanced so I called a local tire shop and the manager told me to bring in the front 2 only, so the rear duals are not balanced. I was wondering if this may be the cause of the shake or if it is caused by a worn out steering coupler.
Camper Berk

CamperBerk is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-03-2010, 12:33 PM   #2
Administrator in Memoriam
Hitchhiker's Avatar

Appalachian Campers
Join Date: Jan 2000
Location: Buladean, NC
Posts: 8,127
It's probably a tire out of balance or a broken belt in one.

Try moving a rear tire to the front one at a time and see if the symptom changes. Or, if you have a good spare, swap it for one of the fronts and then for the other front to observe for any symptom change.

'11 GMC Acadia SLT AWD
'11 GMC Sierra 1500 4x4 Extended Cab
Hitchhiker is offline   Reply With Quote
Old 06-04-2010, 09:18 AM   #3
Senior Member
PlayItForwrd's Avatar
Tiffin Owners Club
Join Date: Feb 2010
Posts: 315
How many driveline's that thing got? I'm betting 2, and it's also a fair bet that being a '76, the hanger/support bracket bushing and bearing (where the drivelines connect) need changing. Check the U-joints too. Driveline shake can feel like many other types of shaking, and it's speed sensitive too...
2000 40' Tiffin Allegro Bus \ 2003 Chaparral 260 SSI
1988 53 x 14 Skipperliner \ 1995 32' Party Cruiser
1984 Goldwing Aspencade \ 1976 Harley Sportster
PlayItForwrd is offline   Reply With Quote
Old 06-04-2010, 11:49 AM   #4
Registered User
jhlady's Avatar
Forest River Owners Club
Ford Super Duty Owner
Join Date: May 2007
Location: Oregon / Arizona
Posts: 93
Camper Berk,

Is the vibration in the steering wheel or the seats? If it's the seats and other parts of the rig then most likely it is a rear tire/wheel or driveline like others have said. A good tire shop should be able to resolve for you if they are willing to spend some time eliminating variables and checking the driveline throughly.

Good luck!

jhlady is offline   Reply With Quote
Old 06-04-2010, 06:28 PM   #5
Junior Member
Join Date: Jun 2010
Posts: 3
Thanks everyone for your input! Tomorrow I am going to change the rear wheel bearings and seals, U joints, and the steering coupler.. Also, I am going to have the rear wheels balanced.. I figure since it is a 1976 it can use an overhaul..
Edit: The vibration is in the seats and the steering wheel.
CamperBerk is offline   Reply With Quote
Old 06-05-2010, 07:15 AM   #6
Join Date: Aug 2009
Posts: 34
Had a vibration in my steering wheel that made it go side to side at 50 to 55 on my 79 brave, so i moved my front wheels to the inside back and put the outside back on front and now there's no more vibration at all man what a work out that was think i lost ten pounds...
Ridgerunner is offline   Reply With Quote
Old 06-08-2010, 08:54 PM   #7
Senior Member
scenic route's Avatar
Join Date: Jan 2010
Posts: 1,767
CamperBerk, The low speed shimmy (30mph) is a good indicator of a tire problem...excessive runout caused by a bad belt, high point (run out) of the tire matched to the high point of the rim or it could be a defect in the tire. I'd take it to a tire shop and have them do a runout check of the tires. Normally, an out of balance tire will not cause a shimmy/vibration at such a low rpm=mph.

As mentioned, rotating is a good trouble shooting technique and may quieten down the shimmy/vibration, but you'll still have an out of round tire on your RV. If your tires are still relatively new, have the manufacturer's dealer take a look see...may be covered under manufacturer's warranty and eligible for an adjustment. Good luck, Bob
Jan and Bob

RIP 'Squeaky'
scenic route is offline   Reply With Quote
Old 06-09-2010, 06:55 AM   #8
Junior Member
Join Date: Jun 2010
Posts: 3
well i have replaced rear wheel bearings/seals, have the drive shafts out and the U-joints out also but the weather is not cooperating with me, looks like 2 more days of rain before i can even think about putting it all back together and then I will be taking it to the tire place that put the tires on to see about a bad belt or runout.. I will keep everyone posted as soon as I can return to tinkering on this machine...

CamperBerk is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
55 mph max for toad georgetown350 Toads and Motorhome Related Towing 16 10-18-2009 01:10 PM
MPH towing test on two trips Don (W5IT) Trailer Towing and Tow Vehicles Discussion 5 06-01-2008 07:12 AM
humming/drone/whistle at 60-65 mph bullydogs1 Workhorse and Chevrolet Chassis Motorhome Forum 9 04-05-2007 08:53 AM
Furnace Not Lighting @ 65 MPH max49 MH-General Discussions & Problems 5 01-15-2007 05:50 AM
Vibration at 50-55 MPH Fxrscotty MH-General Discussions & Problems 9 06-06-2006 05:12 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:17 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.