TimFX Posted June 28, 2017 Report Share Posted June 28, 2017 I'm getting a vibration, shuddering, while driving between 35mph and 50mph. Had the wheels and driveshaft balanced, still shaking. Ideas? T Quote Link to comment Share on other sites More sharing options...
knuckleharley Posted June 28, 2017 Report Share Posted June 28, 2017 Static or spin balancing? Did you check the u-joints in the drive shaft for play? Quote Link to comment Share on other sites More sharing options...
1949 Wraith Posted June 28, 2017 Report Share Posted June 28, 2017 What tires does your car have? I have some of the Coker Nostalgia radials 6.5 -16 and I get some vibration from flats spots that can be improved with increasing tire pressure. I run around 42 PSI and it is pretty bad vibration until the tires heat up and increase the pressure more. Quote Link to comment Share on other sites More sharing options...
White Spyder Posted June 28, 2017 Report Share Posted June 28, 2017 I have the Cokers too. No issue and they are about 4 years old. Just need to drive it more often! Quote Link to comment Share on other sites More sharing options...
greg g Posted June 28, 2017 Report Share Posted June 28, 2017 (edited) Try rotating the drive shaft 180 degrees. Take it off the differential flange twist it 180 and fasten it back up. Strange but might do the deed. While you are under three, assure that the park brake is fully released when off. Edited June 28, 2017 by greg g 1 Quote Link to comment Share on other sites More sharing options...
captden29 Posted June 28, 2017 Report Share Posted June 28, 2017 my car was doing the same thing. no amount of tire balance helped. mine was a combo of spokes on old wire wheels getting loose and old tires. put the steel rims back on, new tires and the problem was solved. I never heard of rotating the driveshaft, but an easy thing to do and no money involved. I just wonder what it does? capt den Quote Link to comment Share on other sites More sharing options...
knuckleharley Posted June 28, 2017 Report Share Posted June 28, 2017 4 hours ago, captden29 said: my car was doing the same thing. no amount of tire balance helped. mine was a combo of spokes on old wire wheels getting loose and old tires. put the steel rims back on, new tires and the problem was solved. I never heard of rotating the driveshaft, but an easy thing to do and no money involved. I just wonder what it does? capt den Sometimes a driveshaft is balanced and spins smoothly one way,but if you take it off and rotate it when you put it back in,it will be out of balance. Quote Link to comment Share on other sites More sharing options...
rcb Posted June 28, 2017 Report Share Posted June 28, 2017 Have you had someone true the wheels? if they are spin balancing and the drop the shield they may not even notice. I've had bent rims before... just a touch off, but you could definitely tell it at speed. However, the wheel balanced just fine. Once you got fast enough it would smooth out. Quote Link to comment Share on other sites More sharing options...
nonstop Posted June 30, 2017 Report Share Posted June 30, 2017 Check your pinion angle. My springs were sagging, which threw off my pinion angle. I added degree shims and my vibration is almost gone. Quote Link to comment Share on other sites More sharing options...
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