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11-11-2012, 06:35 AM
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#1
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Junior Member
Join Date: Nov 2012
Posts: 6
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vibration driving me nuts
hello all i am new to this forum and aslo new to rving. i purchased a like new 2002 newmar moutian aire gas motorhome. it has 15000 miles on it i have been completely thought iit. shocks batteries tires, alaignment. have had the complete motorhome gone thu. hrer is the issue. at 54 to about 58 mph. there is a vibration. can feel it in stearing wheel seat gas petal you also feel it in the passenger seat. we have been through all the items that could cause the vibration. tires balance front end u joints harmonic balancer to no avail. now i have been told that it might be the driveshafts may need to be balanced, or the flywheel may have lose a weight. any input. ps i thought that flywheels were drilled to balance then. any input would be welcome. thanks doug
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11-11-2012, 06:47 AM
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#2
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Senior Member
Tiffin Owners Club Workhorse Chassis Owner
Join Date: Dec 2010
Location: Northern Virginia
Posts: 1,499
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Just to get started, I would check the drive shaft by listening for a 'clunk' when going from forward to reverse. Should not be slack in the drive shaft(s).
Tires - check the DOT date code (last 4 numbers stamped on the tire after 'DOT') - if the tires are original (XX02 date) they are end of life. Or if the RV sat a long time the tires may need a good long trip to heat them.
P.S. What chassis - Ford or Workhorse.
__________________
Tom and Amy from Northern Virginia.
2000 Allegro 454/Workhorse P32/TST/Crossfire
Life is a DIY project, so own less and live more
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11-11-2012, 07:06 AM
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#3
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Junior Member
Join Date: Nov 2012
Posts: 6
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thanks for your reply. tires are new,driveshafts have been checked all tight. nothing loose in the front end, tires have been rebalanced also they moved tires from front to rear all with no change in the vibration.
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11-11-2012, 07:11 AM
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#4
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Junior Member
Join Date: Nov 2012
Posts: 6
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oops forgot its a workhorse chassis
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11-11-2012, 08:33 AM
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#5
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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A clunking U-joint isn't necessarily an indication of an out of balance driveshaft, just loose or worn U-joints. If everything else in steering/alignment/tire and wheel balance has been inspected and eliminated, the next step would be driveshaft before going after the flywheel. I too thought they were drilled to balance.
I think your shop should be able to jack up the rear end and run the speed up to 58 mph. That should reveal the vibration if it's coming from the driveshaft.
__________________
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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11-11-2012, 10:03 AM
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#6
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Senior Member
Fleetwood Owners Club
Join Date: Jan 2010
Posts: 1,391
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Pull the drive shafts and take to a driveline rebuilder. They will be able to spin in a lathe and add balance weights. Also check the U joints and make sure they are in time.
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11-11-2012, 10:17 AM
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#7
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Senior Member
Join Date: Apr 2009
Posts: 291
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Vibration driving me nuts
Ckassic symptom of an out of round tire..Front tires. May have to. Be trued after testing.. Jack front end and spin tires moving a piece of wood closer abd closer to rhe tire until it touches.. If it touches only certain points on the tire and not evenly, it needs truing...rkl
__________________
2002 Journey 36GD, Roadmaster Blackhawk tow system, 2006 Jeep Commander Hemi, 2005 Jeep Wrangler...Webster NY/Ft Myers Fl.
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11-11-2012, 10:34 AM
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#8
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: Port Charlotte Florida
Posts: 2,721
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Quote:
Originally Posted by vettenut0
hello all i am new to this forum and aslo new to rving. i purchased a like new 2002 newmar moutian aire gas motorhome. it has 15000 miles on it i have been completely thought iit. shocks batteries tires, alaignment. have had the complete motorhome gone thu. hrer is the issue. at 54 to about 58 mph. there is a vibration. can feel it in stearing wheel seat gas petal you also feel it in the passenger seat. we have been through all the items that could cause the vibration. tires balance front end u joints harmonic balancer to no avail. now i have been told that it might be the driveshafts may need to be balanced, or the flywheel may have lose a weight. any input. ps i thought that flywheels were drilled to balance then. any input would be welcome. thanks doug
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Try driving it at the same rpm in a lower gear that equals your rpm condition of 54/58 in high gear. If you get the vibs at the same rpm but less speed it's engine related. If you don't then take it up to 54/58 in the lower gear. Assuming the vib returns that would prove the problem is speed related. meaning driveshaft, wheels, tires, rotors are suspect.
I would have someone elsewhere in the coach at speed and see if it is present, better, or worse towards the rear ( I know, I know, some risk, but that is what I would do ).
__________________
[SIGPIC][/SIGPIC]2008 Bounder 38P F53 24/30K V10, 2013 Kia Soul Basic 6 speed manual, Ready Brake Elite tow system (previous equipment 1996 Pace Arrow Vision w/Acme Dolly)
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11-11-2012, 10:38 AM
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#9
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Senior Member
Join Date: Sep 2002
Location: Kingston, Wa. USA
Posts: 1,221
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Quote:
Originally Posted by Brockx
Try driving it at the same rpm in a lower gear that equals your rpm condition of 54/58 in high gear. If you get the vibs at the same rpm but less speed it's engine related. If you don't then take it up to 54/58 in the lower gear. Assuming the vib returns that would prove the problem is speed related. meaning driveshaft, wheels, tires, rotors are suspect.
I would have someone elsewhere in the coach at speed and see if it is present, better, or worse towards the rear ( I know, I know, some risk, but that is what I would do ).
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X-2
__________________
Cliff
'01 3500 Ram QC HO 6sp. BD Exhaust Brake
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11-11-2012, 10:45 AM
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#10
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Senior Member
Monaco Owners Club
Join Date: Sep 2011
Location: Whitney, TX
Posts: 437
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Quote:
Originally Posted by stuhly
Pull the drive shafts and take to a driveline rebuilder. They will be able to spin in a lathe and add balance weights. Also check the U joints and make sure they are in time.
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A lot of people don't believe there is any such thing as U joint timing. I guarantee you there is! If the joints are out of phase, you'll get vibration. After a while, a yoke or something else will break.
__________________
USAF, Retired (1962 - 1983)
2006 Monaco Diplomat 40 PRQ
2006 Honda CR-V Toad
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11-11-2012, 11:18 AM
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#11
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: Port Charlotte Florida
Posts: 2,721
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Quote:
Originally Posted by gfs1943
A lot of people don't believe there is any such thing as U joint timing. I guarantee you there is! If the joints are out of phase, you'll get vibration. After a while, a yoke or something else will break.
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Absolutely
__________________
[SIGPIC][/SIGPIC]2008 Bounder 38P F53 24/30K V10, 2013 Kia Soul Basic 6 speed manual, Ready Brake Elite tow system (previous equipment 1996 Pace Arrow Vision w/Acme Dolly)
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11-11-2012, 11:21 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Jul 2011
Location: B.C.
Posts: 4,638
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Quote:
Originally Posted by gfs1943
A lot of people don't believe there is any such thing as U joint timing. I guarantee you there is! If the joints are out of phase, you'll get vibration. After a while, a yoke or something else will break.
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That is a good point. This can happen if the driveline was removed and put back on with the yokes not lined up.
__________________
Dennis & Marcie & Captain Hook The Jack Russell,aka PUP, 2006 Itasca 29R 2017 Equinox toad. RVM59
We came, we went, nothing broken, nothing bent!
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11-11-2012, 11:28 AM
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#13
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Senior Member
Monaco Owners Club
Join Date: Jun 2007
Location: Lake Havasu City, AZ
Posts: 1,392
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If it has a two piece drive shaft then the center support bearing should be checked too.
__________________
2012 Monaco Knight 36 PFT
Towing either a 2019 Jeep Grand Cherokee Overland or a car in a 20' enclosed car trailer.
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11-11-2012, 11:32 AM
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#14
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Senior Member
Join Date: Sep 2002
Location: Kingston, Wa. USA
Posts: 1,221
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Quote:
Originally Posted by slickest1
That is a good point. This can happen if the driveline was removed and put back on with the yokes not lined up.
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That is true but with that problem it will complain at most any and all speeds.
__________________
Cliff
'01 3500 Ram QC HO 6sp. BD Exhaust Brake
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