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Old 09-28-2008, 05:34 AM   #1
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We just bought a 2009 Winnebago Sightseer (35J) with a W21 Workhorse Chassis. Since we got it we are fighting a vibration. We decided to rebalance the front tires, the mechanic informed us that both front rims were out of round. Workhorse sent us two new rims, one of which is way out of round, the other fine. Waiting for a new rim again....will this really fix the vibration problem....my wife detected a vibration in the rear when seated at the dining table. In our area not one of the 3 Workhorse (Montreal, QC) dealers is equipped to help us with the rebalancing of the tires. Any ideas how to deal with this situation? Thanks.
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Old 09-28-2008, 05:34 AM   #2
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We just bought a 2009 Winnebago Sightseer (35J) with a W21 Workhorse Chassis. Since we got it we are fighting a vibration. We decided to rebalance the front tires, the mechanic informed us that both front rims were out of round. Workhorse sent us two new rims, one of which is way out of round, the other fine. Waiting for a new rim again....will this really fix the vibration problem....my wife detected a vibration in the rear when seated at the dining table. In our area not one of the 3 Workhorse (Montreal, QC) dealers is equipped to help us with the rebalancing of the tires. Any ideas how to deal with this situation? Thanks.
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Old 09-28-2008, 05:41 AM   #3
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There are places that can True a rim

Cost is low and it might be better than shipping back & forth to WH.

However... Though I have used such a service on car wheels.... I'm not sure how it affects the strength of the product and if that would be an issue on a MH
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Old 09-28-2008, 05:59 AM   #4
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I had significant vibration issues with my new 2006 Itasca 35U. I see it as important to diagnose and correct vibration problems in the correct sequence. I believe the order of steps below is a good one.

First isolation step was to confirm correct conditions with rims and tire pressures....and front alignment.

Second step was to diagnose status of driveline. I had a bad rear diff gear. WH replaced under warranty through work with WH Service Center. An experienced driveline tech is needed to pin this problem down..if it exists..using tools mentioned here.

www.differentials.com/diagnose.html

Third step was to add the 700 Series Centramatics. A little pricey but it's lifetime balance and a smooth ride saves both tires, shocks and coach electronics and adds great longterm drive day comfort. Adding Centramatics to rear duals versus just steer tires really smoothed out the rear of the coach. Centramatics balance the complete wheel-tire assembly...rotating brake parts etc...not just tire and rim..

www.centramatic.com/howworks.html

Fourth step was to add insulation to the engine compartment hump cover. Both radiated engine and road heat and road-tire noise is reduced by adding insulation here.

Final step was to add Koni FSD shocks to all four wheels.

My rig now is as smooth and quiet in the comparments as most luxury cars..One can actually talk in normal voice to pax while driving. Radio/CD is like listening at home. Driver fatigue is greatly reduced on long drive days.

Good luck..
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Old 09-28-2008, 06:37 AM   #5
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by AlainLe:
Any ideas how to deal with this situation? Thanks. </div></BLOCKQUOTE>I have found a good amount of success in seeking assistance from heavy duty truck alignment shops or a commercial tire store that can work on trucks. They are equipped to handle big rigs including balancing 22.5 inch tires.
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Old 09-28-2008, 06:42 AM   #6
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by DriVer:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by AlainLe:
Any ideas how to deal with this situation? Thanks. </div></BLOCKQUOTE>I have found a good amount of success in seeking assistance from heavy duty truck alignment shops or a commercial tire store that can work on trucks. They are equipped to handle big rigs including balancing 22.5 inch tires. </div></BLOCKQUOTE>

I agree...especially when it comes to wheel-tire rotations and correct/recurring retorque of lug nuts.
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Old 10-08-2008, 04:17 PM   #7
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Went through six months of "must be this" ended up with a mech that took one look at the drive train, balanced and realigned the aft drive shaft and no more vibration...very nice.
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