MGD72Monte Posted October 4, 2012 Share Posted October 4, 2012 My car has had a vibration in the rear at highway speeds eversince I can remember. I have refurbished or replaced everything in the rear, including the wheels and tires. I'm thinking it might be the driveshaft or the yoke. I did measure more runout than recommended, hard to tell if due to driveshaft or yoke. Anyone had any experience having driveshafts checked for balance and/or straightness? Any tips/theories? Thanks Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted October 4, 2012 Share Posted October 4, 2012 Reindex it see if that helps. get it up on stands and remove the rear shaft bolts pull it off pinion yoke and turn it 180 and reconnect it and try it. you can also run it while up on stands and check the runout on the shaft that way. You may have to take it to a drive shaft place to have it ballanced. Quote Link to comment Share on other sites More sharing options...
Andreas Posted October 4, 2012 Share Posted October 4, 2012 Every decent driveshaft shop should be able to check and rebalance the shaft for a few bucks... Quote Link to comment Share on other sites More sharing options...
BIG E Posted October 5, 2012 Share Posted October 5, 2012 Is there a chance one of the universal joints could be causing the vibration? Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted October 5, 2012 Share Posted October 5, 2012 a change in ride height can cause it too (u joint angles) Quote Link to comment Share on other sites More sharing options...
MGD72Monte Posted October 5, 2012 Author Share Posted October 5, 2012 Thanks for the input guys, I'll try the re-indexing. If that doesn't work, I'll take the driveshaft to a shop. The U-joints are in good shape, the rear one has been changed relatively recently so I don't think it is an issue. The ride height was changed a few years ago when I installed stock height springs but not sure how that would cause a vibration and what the fix would be? Sam can add to what you mean? Quote Link to comment Share on other sites More sharing options...
stangeba Posted October 5, 2012 Share Posted October 5, 2012 My nephew lived with this problem for years with his 57 Chevy till he took it to a rear axle shop that found several different things like drive shaft, U-Joints, axle bearings. He was very happy when they finished. Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted October 6, 2012 Share Posted October 6, 2012 a change in the ride height will change the working angles on the u joints Quote Link to comment Share on other sites More sharing options...
wallaby Posted October 7, 2012 Share Posted October 7, 2012 At stock ride height, the angles should be ok. It's when you raise the rear end that the angles change and cause issue. It's also possible that your angles are wrong bcause of bad bushings in the rear control arms (uppers or lowers). Because you really don't know what the problem is, I'd take the whole car into the driveline balance place and describe your problem. Let them check it out and advise you. They can check the angles and straighness and such and confirm they solved the problem with a test drive. If you simply remove the driveshaft and carry it to them, they will balance it and it may/may not correct the problem. Quote Link to comment Share on other sites More sharing options...
Ian Posted October 8, 2012 Share Posted October 8, 2012 I went crazy trying to find a vibration a few years ago. Quote Link to comment Share on other sites More sharing options...
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