Beaver Posted July 10, 2011 Share Posted July 10, 2011 hey all. The trump has started this strange vibration that is getting worse. Ive only noticed it since I lowered it, which also happened to be the same time the new wheels went ont. it only happens above about 70km and is not noticibly different at different speeds above this. it starts of small then gets bigger and then dissapears for 5-10 seconds, then starts again, gets bigger, then dissapears again etc etc. seems pretty consistent it terms of size of vibration and how long it happens for and how long untill it returns. its a shudder/vibration that feels drivetrainsh, although it also comes through the steering wheel. others in the car notice it as well. any thoughts as to what would be causing it? im presuming its related to being lowered, but its strange how it comes and goes, and when its gone, its perfectly smooth. as the trump is independent rear, the driveshaft angle hasnt changed, but the rear axles have (which have ujs). ill try have a nosey at these and look far any play etc, but anywhere else I should be looking? will probably have to get parts from the uk, so dont just want to go replacing everything willy nilly cheers Quote Link to comment Share on other sites More sharing options...
Taistorm Posted July 10, 2011 Share Posted July 10, 2011 Did you have the wheels balanced before putting them on? Same thing happened on my Gf's car when we put a new set of wheels on, at higher speeds the drivetrain was shuddering like crazy and the steering wheel was rocking real bad. Just needed to get the wheels balanced and the problem was ressolved. Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 yeh wheels have been balanced. its getting worse, so I dont think its the wheels, as I cant see how they would get worse over time. might try the original wheels though just to confirm its not the new ones Quote Link to comment Share on other sites More sharing options...
AndyGal Posted July 10, 2011 Share Posted July 10, 2011 My utes rear universal joint on the driveshaft was poked and that mad a bandit vibration sometimes that streadily got worse. Check theres no play in those? Quote Link to comment Share on other sites More sharing options...
smokin' joe Posted July 10, 2011 Share Posted July 10, 2011 yeh wheels have been balanced. its getting worse, so I dont think its the wheels, as I cant see how they would get worse over time. might try the original wheels though just to confirm its not the new ones how old are the tyres/ how long have they been on the rims?? mate had this issue on a A12 Morrie thou, wheels were balanced, but wern't running true. fitted new tyres to that axle and problem fixed. Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 tyres are pretty old, came with the rims. its getting worse so I doubt its the tyres. will look into the ujs in the back axles Quote Link to comment Share on other sites More sharing options...
KKtrips Posted July 10, 2011 Share Posted July 10, 2011 Make sure the rear driveshafts are well greased - they will have slides in them to allow the driveshaft to shorten/lengthen as the suspension travels. If they are dry they can cause this type of problem. Also make sure the driveshaft slides have not bottomed out or are close to bottoming out of travel. Lowering the car would have quite substansially changed this length. Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 ah yes good point. shall investigate Quote Link to comment Share on other sites More sharing options...
smokin' joe Posted July 10, 2011 Share Posted July 10, 2011 don't the trumpy's camber over when lowered?? Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 lol yes, camber is pretty crazy. Quote Link to comment Share on other sites More sharing options...
smokin' joe Posted July 10, 2011 Share Posted July 10, 2011 lol yes, camber is pretty crazy. thought so. if the UJ's seem fine, i'd be having a good look at tyres/wheels/wheel bearings, as the extra camber puts more load on everything after the diff Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 yeh for sure. will jack it up and take the wheels off and see how everything looks Quote Link to comment Share on other sites More sharing options...
Unclejake Posted July 10, 2011 Share Posted July 10, 2011 This sounds like the troubles a bloke has when his wheels have the wrong centre bore size. Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 hmmm interesting. there is a 99% chance they are wrong, so could be worth looking into Quote Link to comment Share on other sites More sharing options...
peteretep Posted July 10, 2011 Share Posted July 10, 2011 would only be an issue if they werent located properly, it wouldnt matter if the hole wasnt quite centered properly I as it could be sorted with balancing Quote Link to comment Share on other sites More sharing options...
kyteler Posted July 10, 2011 Share Posted July 10, 2011 Quick test it man. Slap your standards back on and see if the problem is gone. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted July 10, 2011 Share Posted July 10, 2011 would only be an issue if they werent located properly, it wouldnt matter if the hole wasnt quite centered properly I as it could be sorted with balancing Nope. It doesn't work like that at speed. If there is play between the rim and the hub spigot the wheels move around on the studs once the centrifugal forces increase. It isn't such a problem on the rear wheels, but will certainly give a vibration through the front wheels. The vibration will come and go as the wheels flail around on the studs (or bolts) Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 10, 2011 Author Share Posted July 10, 2011 so if it does turn out to be the wheels not locating properly and "flailing" (made me lol), then Il need to get some locating rings (or whatever to he cool kids call them) made up yeh? it does make sense, as something needs to change for the vibrations to stop etc, and your theory would explain it perfectly UJ Quote Link to comment Share on other sites More sharing options...
ryanfels Posted July 10, 2011 Share Posted July 10, 2011 Also make sure the driveshaft slides have not bottomed out or are close to bottoming out of travel. Lowering the car would have quite substansially changed this length. Lowering shouldnt have effected/affected the driveshaft as the head wouldnt have moved being IRS and all Quote Link to comment Share on other sites More sharing options...
Spencer Posted July 10, 2011 Share Posted July 10, 2011 He means the driveshafts after the diff MR FELS the ones that go to the wheels and make it go broom Quote Link to comment Share on other sites More sharing options...
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