|
07-06-2020, 11:46 PM
|
#1
|
Junior Member
Join Date: Jul 2020
Posts: 4
|
Help with vibration at certain speeds
Hello.
I’ve been trying to do my research on this problem and not sure I’m looking in the right place.
We have a Tioga class c, Ford e450, 2006. Since buying it 5 years ago there has been this “rattle” noise at about 55mph that sounds like its coming from the center console. Rattles and squeaks are not something to be concerned about, until today. I’m on a long trip across Wyoming and found that the rattle:
Begins at 55 mph for a second, then goes away 56-62, returns 63-71, then gone again. Very specific speeds, and unrelated to rpms.
I’ve read a lot about driveshaft misalignment, but people asking if you “can outrun it”, which I can. (I haven’t read anything about what it could be if you can “outrun it”.)
The noise/vibration is loud and center front, like it’s under the center console. You cannot feel it in the steering wheel or by placing your hand on anything. Totally different from every other squeak/rattle.
We are on our second set of tires, and these are totally different tires this last round. Had them rebalanced today, so this is not suspect. Looking forward to advice. Thanks so much.
|
|
|
|
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!
|
07-07-2020, 12:30 AM
|
#2
|
Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,321
|
Sounds like u-joint or drive shaft problems.
We used to pull the drive axles out and run up to the speed the vibes are happening.
Take a bar and give the u-joints a good jiggle.
Any movement, and you likely found your problem.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
|
|
|
07-07-2020, 07:59 AM
|
#3
|
Junior Member
Join Date: Jul 2020
Posts: 4
|
Ok, thanks so much. As soon as I can I’ll have take a look at these.
|
|
|
07-07-2020, 09:32 AM
|
#4
|
Senior Member
Monaco Owners Club Ford Super Duty Owner
Join Date: Dec 2008
Location: Kingsville TX
Posts: 1,754
|
Possible heat shield rattle, crawl underneath and use a rubber mallet, start tapping around, bet you will find it.
|
|
|
07-07-2020, 12:12 PM
|
#5
|
Junior Member
Join Date: Jul 2020
Posts: 4
|
Thanks, I’ll look for that first.
|
|
|
07-08-2020, 09:13 PM
|
#6
|
Senior Member
Join Date: Apr 2019
Location: Arisona
Posts: 700
|
If speed and not RPM sensitive are you feeling any vibration in the SW or the seat of your pants? Or are you just hearing a rattle? If you do feel vibration I would check the tires and wheels.
__________________
2023 GD Imagine XLS 23LDE 2022 Ford F-150
|
|
|
07-08-2020, 10:11 PM
|
#7
|
Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
|
While you're under checking U joints, make sure if you have a 2 or more piece driveshaft, all joints are running in the same plane.....
|
|
|
07-11-2020, 04:37 AM
|
#8
|
Senior Member
Join Date: Nov 2009
Posts: 1,152
|
If you have a multi-piece driveshaft (probably) with carrier bearing check to see if the rubber has shrunk. If it has this allows the driveshaft to float in the bracket causing what you are feeling.
Usually a piece of an old serpentine belt cut to fit on the flat side of the rubber will take up the space and cure the problem.
GM had a tech bulletin on many of their trucks to install a thin strip of metal to take up this space and fix this vibration. WE found the old piece of belt worked just as well.
I did this on my F53 chassis a couple of years ago for this issue.
|
|
|
07-11-2020, 06:46 AM
|
#9
|
Senior Member
Ford Super Duty Owner
Join Date: Jan 2011
Location: Lowell, Arkansas
Posts: 7,297
|
What you're experiencing is somewhat typical of any vibration. Vibrations are small movements of loose parts be they a heat shield or a small interior piece of metal that has rusted and separated from another piece of the exhaust pipe allowing the vibration to occur. They will often occur at different road speeds which translates into different frequencies.
Then there's a harmonic of a frequency. The noise starts at 50 MPH then starts again at say 56 MPH because it's a harmonic of the first frequency. It could also be called a sympathetic vibration of the first frequency. It matters not it's still a vibration and can be stopped once you locate the source.
On several occasions over the years I saw interior exhaust pipes rust away and actually fold down internally partially blocking the exhaust flow. Depending on the blockage at low speeds the exhaust could get out so no issues. At higher speeds the exhaust couldn't get out the pressure built up resulting in a great loss of engine power. Those didn't cause vibrations but sure was a difficult diagnosis. It is possible that it could cause an audible vibration.
Do the diagnosis as suggested by others and you may spot something. Heat shield are notorious for having one spot weld break loose and vibrating at higher roads speeds. The rubber mallet it a good way to diagnosis those.
__________________
TeJay Auto Instructor/4-yrs USAF/ Liz: RN/ WBGO 2014 Vista 30T/ F-53/CHF/5-Star/Koni * Bella & Izzy * Golden /Cocker mix/ Louie The Cat* All Retired
|
|
|
07-12-2020, 11:42 AM
|
#10
|
Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,309
|
Read a recent humor article, guy bought a car at great price due to a known knock/noise still there, rattle they thought was suspension; after replacing shocks, he FOUND the noise was multiple loose golf balls in hidden area in the trunk :-)
__________________
(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
|
|
|
07-13-2020, 12:02 PM
|
#11
|
Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,309
|
Crawl under, starting at back and check all exhaust hangers and heat shield mounts. I had new clamps, but lost 8ft tailpipe after weld peeled. For any one length, esp. behind rear axle, have THREE Clamp hangers, not just two.
__________________
(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
|
|
|
07-15-2020, 08:04 PM
|
#12
|
Junior Member
Join Date: Jul 2020
Posts: 4
|
Thanks, everyone. After crawling around and a couple of failed attempts, we finally found it. It was a heat shield that was rattling against another piece. It has been temporarily secured, and will be permanently fixed after I’m back home. Such a relief to have found it. Thanks again.
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|