Rotorhead Posted June 28, 2021 Report Share Posted June 28, 2021 Hello All, Well I finally found a rig I like for my future needs. A 2010 Volvo 780. Of course needs some TLC but hey, it's used. Anyway when I was driving it home from out of state I noticed two things. 1. it sounds like a Sherman tank, is that what they sound like normally from the inside while on the road? 2. and more importantly it has a pretty significant shake at 60mph. Nothing really in the steering wheel, it just shakes. So I am seeking any ideas from all who have the experience. What could it be? The sound is kinda like a drum roll. Tires look like they are wearing evenly. It has brand new brakes on the front. Once I get this shake resolve It will be pretty darn nice. Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted June 28, 2021 Report Share Posted June 28, 2021 Need to know where you feel the shake. Steering wheel, seat bottom, feet? Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
Rotorhead Posted June 28, 2021 Author Report Share Posted June 28, 2021 Mostly in the seat. Some at the feet and not really anything in the wheel. Quote Link to comment Share on other sites More sharing options...
Star Dreamer Posted June 28, 2021 Report Share Posted June 28, 2021 Could be one of these or multiple of them or other stuff. Tires out of balance, bent drums, wrong drive line angle, driveshaft out of balance, bad u joints, Etc... Quote 2005 Freightliner Century S/T, Singled, Air ride ET Jr. hitch 2019 46'+ Dune Sport Man Cave custom 5th wheel toy hauler Owner of the 1978 Custom Van "Star Dreamer" which might be seen at a local car show near you! Check out http://www.hhrvresource.com/ for much more info on HDT's. Link to comment Share on other sites More sharing options...
geodog Posted June 28, 2021 Report Share Posted June 28, 2021 I would look for exhaust leaks for the noise. As to the shake start with an inspection of the U-Joints, ShortyO Quote Link to comment Share on other sites More sharing options...
jenandjon Posted June 28, 2021 Report Share Posted June 28, 2021 What do the steer tries look like? This sounds like something I would make them fix before I write the check. Quote Farmer, Trucker, Equipment operator, Mechanic Quando omni flunkus moritati-When all else fails, play dead I'm a man, but I can change, if I have to, I guess. Link to comment Share on other sites More sharing options...
Deezl Smoke Posted June 28, 2021 Report Share Posted June 28, 2021 6 hours ago, Star Dreamer said: Could be one of these or multiple of them or other stuff. Tires out of balance, bent drums, wrong drive line angle, driveshaft out of balance, bad u joints, Etc... These are where I would start. I had a beautiful Freightliner fld120 that when I bought it, had a shake that started about 50 mph. The prior owners put all new virgin tires on it to try to stop it. No luck. They put all new brake shoes and drums on, no luck. They rotated the front tires on the wheels 180, no luck. New shocks etc., etc., etc. No luck. So they gave up and sold the truck to me. I bought a pair of those bead balancer tubes that go between the wheel and brake drum. No luck. I put a gopro on the frame up front and went for a drive. No shaking from the front axle. Put it on the rear frame, no shaking. Prior owners had the local drive line shop check the u-joints and drive line trans to axle, and interaxle etc. By pure luck I happened to catch up with crusty old log truck mechanic and told him what was going on and what was done to solve it. He shook is head and said drive shaft slip yoke. I told him the truck was at a drive line service shop and they said nothing was wrong with the drivelines. Did'nt care. Said slip yoke period. Go talk to Ken at 6 states in Portland he said. Ok. So I called Ken and he agreed. Said just bring the whole drive line in and he will show me why. I did, he did. New slip yokes and splines for the main and interaxle, a couple hunnerd bucks, problem solved. My truck had a manual 10 speed so I could also "feel" the shake in my hand when at speed. Once I got the slip joints replaced, smooth as glass as they say. Quote I'm a work'n on it. Link to comment Share on other sites More sharing options...
Darryl&Rita Posted June 28, 2021 Report Share Posted June 28, 2021 Yup, in the seat isn't tires. Time to go over the driveline. U joints are easy, steady bearing is mildly harder, slip joint too. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
Rotorhead Posted June 28, 2021 Author Report Share Posted June 28, 2021 Thanks. Is that something I could check for play and change myself? Quote Link to comment Share on other sites More sharing options...
Parrformance Posted June 28, 2021 Report Share Posted June 28, 2021 Had the same issue with a Jeep driveshaft. Splines were worn at the ride height. Quote 2006 Volvo VNL 780, " Arvey" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift 2003 Jeep Wrangler Rubicon 2010 Forest River Coachman Freedom Express 280RLS Jackalopee Link to comment Share on other sites More sharing options...
dennisvr Posted June 28, 2021 Report Share Posted June 28, 2021 All good suggestions about the drivelines, ujoints and splines. One other quick and easy check is to check and see if the driveline is in time. This means, are the ujoints lined up. If the truck was towed and the driveline pulled, what they do is un bolt the ujoint at the diff and pull it out of the splines at the slip joint. When it is reinstalled it could have been one spline off and it will cause a vibration. Look to see if the ujoints are lined up to each other. Quote "It is better to have more truck than you need than to need more truck than you have" 2001 Volvo 660, Cummins 400 ISX, Eaton 3 Peddle Auto Shift 2014 Fuzion 40' Toyhauler 2015 Smart Car Link to comment Share on other sites More sharing options...
Deezl Smoke Posted June 28, 2021 Report Share Posted June 28, 2021 5 minutes ago, dennisvr said: All good suggestions about the drivelines, ujoints and splines. One other quick and easy check is to check and see if the driveline is in time. This means, are the ujoints lined up. If the truck was towed and the driveline pulled, what they do is un bolt the ujoint at the diff and pull it out of the splines at the slip joint. When it is reinstalled it could have been one spline off and it will cause a vibration. Look to see if the ujoints are lined up to each other. Big thumbs up. Phase is crucial. Quote I'm a work'n on it. Link to comment Share on other sites More sharing options...
MoneyMakeranch Posted June 28, 2021 Report Share Posted June 28, 2021 My 780 had a bad vibration at 50mph plus, had complete front end rebuild(kingpins, bearings and a new carrier bearing, front steer tires balanced good and had retread super singles on rear. went to have them balanced and only did 2 tires on passenger side before throwing in the towel on them. one tire was 43 ounces and the other was 36 ounces (ouch) so i replaced the 4 supers with virgin tires and all the vibration is GONE, smooth sailing all the way to 85mph plus on the truck. Moma loves the ride now. hope you find the problem and enjoy the truck. Quote Link to comment Share on other sites More sharing options...
noteven Posted June 28, 2021 Report Share Posted June 28, 2021 I'm in the check the driveline U joint alignment and splines camp. A mismounted tire will cause a "470 rpm" out of balance - the tire is running out of round in the vertical plane. A tire shop will dismount the tire and turn the wheel inside the tire and remount it and check the balance. But check the drivelines as mentioned by others.... Quote "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
Ray,IN Posted June 28, 2021 Report Share Posted June 28, 2021 51 minutes ago, noteven said: I'm in the check the driveline U joint alignment and splines camp. A mismounted tire will cause a "470 rpm" out of balance - the tire is running out of round in the vertical plane. A tire shop will dismount the tire and turn the wheel inside the tire and remount it and check the balance. But check the drivelines as mentioned by others.... I agree, all tires have a small ridge near the bead, that is to assist the tire guy to center the tire on the rim. If the small bead is not concentric with the rim the tire is not mounted properly and cannot be accurately balanced. Years ago this mis-mounted tire would be "trued" by shaving off the high-point of tread, then tire engineers developed that small ridge to assist with proper tire mounting. Quote 2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG retired;Good Sam Life member,FMCA ." And so, my fellow Americans: ask not what your country can do for you--ask what you can do for your country. John F. Kennedy 20 Jan 1961 Link to comment Share on other sites More sharing options...
Rotorhead Posted June 29, 2021 Author Report Share Posted June 29, 2021 Thanks for all the information. As I was afraid there could be numerous paths to explore. It just needs a good cleaning and the vibration gone and it will be good to go. A little TLC along the way of course. I will be checking the drive shaft/u-joints tomorrow. Quote Link to comment Share on other sites More sharing options...
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