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Old 09-03-2014, 01:39 PM   #1
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Bad vibration

I get a bad vibration from 40 to 100 feels like it's coming under neath just put a new rear in last year and did the whole new tires things just wondering what else it might be car is 86 svo with 302 in it


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Old 09-03-2014, 02:04 PM   #2
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My car had it also,mine was the driveshaft u joints.


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Old 09-03-2014, 03:03 PM   #3
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Yeah I think I'm gunna pull the driveshaft and take it to have the balance checked and I'll just replace the u joints while I got it out


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Old 09-04-2014, 10:37 PM   #4
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Rev it sitting still with the clutch pedal depressed. If it vibrates is a balancing problem with the motor, likely the balancer. If not then engage the clutch with the car in neutral and rev it again. If it vibrates now you have an issue with the input shaft on the trans, potentially the pilot bearing. If it only happens when you are moving its a driveline problem, probably the driveshaft/u joints but it could be a mount problem on the rear or the motor or the trans mount as well. My car vibrates like crazy right now and I'm doing the motor mounts tomorrow morning. The passenger side primary is damn near hitting the K, that is also something to look out for especially on an older car.

Also could be as simple as a wheel/tire balance.
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Old 09-05-2014, 01:50 AM   #5
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Check the bolts holding the driveshaft to the differential, I had the exact same problem, hope this helps !
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Old 09-05-2014, 05:44 AM   #6
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Yeah it'll only vibrate while the car is moving but I will definitely check all the other stuff you mentioned thanks guys and I'll let ya know what I find


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