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Old 11-16-2012, 09:22 PM   #1
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Huge vibration issue

Purchased my jeep with no front driveshaft due to lift and body lift.. Owner took it out... Bought a Novak cable, and a used junkyard shaft, now at highway speed I get a crazy vibration... Any solutions?

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Old 11-16-2012, 10:14 PM   #2
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Do you have a SYE or transfer case drop? How big is the lift? My guess is that the junkyard shaft is out of balance. The rear driveshaft would be the shaft that is most affected because of a lift, simply because it is so much shorter, and changing the height has a huge change of driveshaft angle. If the rear driveshaft has no vibrations, the front should have no problems at all unless the pinion angle is totally wrong in the front (ie the previous owner got aftermarket control arms) Have you checked to make sure the front and rear gears are the same? Post some pictures of front and back axles and their angles.

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Old 11-17-2012, 12:43 AM   #3
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no vibration without the front driveshaft? If so, may just be that its not balanced. Like tires, driveshafts do need to balanced and can cause vibrations when they arent.
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Old 11-17-2012, 01:02 AM   #4
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Possible bent shaft
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Old 11-17-2012, 01:31 AM   #5
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Did you replace the U joints in the junkyard drive shaft before you installed it?

Different gear ratios front and rear would only be a problem if you were using 4wd
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Old 11-17-2012, 08:13 AM   #6
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All of the above.Also did junky drive shaft have any weights welded to it.They look like small square additional pieces spot welded to different areas on the shaft or look for areas where their was evidence of one.
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Old 11-18-2012, 11:18 AM   #7
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All good points. Thank you.. Shaft did have weights wielded on.. And it had no vibration without the shaft in.. My u joints are in good shape and have no play. I think it just needs balance. I'll take it to the driveshaft shop and have them balance it
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Old 11-18-2012, 11:19 AM   #8
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At 50 mph, no vibration. 55-65 huge vibration
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Old 11-18-2012, 11:24 AM   #9
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One bad tire can be a problem?
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Old 11-18-2012, 05:55 PM   #10
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Quote:
Originally Posted by dale 3
One bad tire can be a problem?
Obviously it's not a tire -_- as I just explained without the shaft it's fine. With it it vibrates
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Old 12-13-2012, 10:33 PM   #11
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Check front ds yoke at tc. Some yokes have came loose

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