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Heavy vibration around 25mph

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Old 05-09-2013, 12:49 PM
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Default Heavy vibration around 25mph

I know this has probably been asked but I couldn't find anything useful. So recently I noticed that when I hit about 25 mph or the end of second gear that the car starts to shake violently and you can feel it like bad. I don't know if it could be wheel balancing or a driveshaft/ujoint problems. This is my dd so I need to get this fixed ASAP. Anyone have any ideas on what it could be
Old 05-09-2013, 03:46 PM
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Need more information.

Lift?
Tires and wheels?
Front or rear vibration?
SYE?
Trackbar?
Old 05-09-2013, 04:45 PM
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3 in lift
31" tires
Sye: yes
The whole damn thing shakes right when I hit the gas in third.. Haha
Old 05-09-2013, 04:59 PM
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Sounds like its coming more from the rear though
Old 05-09-2013, 11:55 PM
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check u-joints.
Old 05-10-2013, 11:55 AM
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Check the rear pinion angle.
Old 05-10-2013, 11:58 AM
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Does it start vibrating and not stop until you go below 25 or does it smooth out once you get to going faster?
Old 05-10-2013, 12:42 PM
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Checked the front and rear ds. The front one moves. And it won't go away until I get below 25
Old 05-10-2013, 02:04 PM
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So I took out the front driveshaft and it still is vibrating the same which makes be believe its the rear u joints
Old 05-10-2013, 02:06 PM
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rear u-joints, pinion angle, bad tire, bad rearend... can't really narrow it down to just the u-joints.

u-joints are the cheapest part if that's the problem though...
Old 05-10-2013, 02:09 PM
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How would you tell if your pinon angle isn't right? I know the rear end is fine and so are the tires
Old 05-10-2013, 02:46 PM
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Originally Posted by '94 XJ
How would you tell if your pinon angle isn't right? I know the rear end is fine and so are the tires
Angle finder. http://www.stu-offroad.com/axle/pinion/pinion-1.htm
Old 05-10-2013, 02:46 PM
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Originally Posted by '94 XJ
How would you tell if your pinon angle isn't right? I know the rear end is fine and so are the tires
The pinion yoke should be pointed directly at the tcase output shaft
Old 05-10-2013, 04:08 PM
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Alright, I'll check on it later thanks man!
Old 05-10-2013, 04:18 PM
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Could it also have anything to do with the t case chain? I need I replace it but haven't got to it yet...
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