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Vibration problems!! Someone help!


 
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Justplayinround
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Joined: 17 May 2007
Location: Northern Virginia

PostPosted: Thu May 17, 2007 12:46 pm    Post subject: Vibration problems!! Someone help! Reply with quote

91 YJ with AX-15 Tranny & Dana 35 rear end. All 4 U-Joints went out on both drive shafts at the same time, replaced all four, now there is a strong vibration between speeds of 30-50 MPH. When I disengage the cluth and "coast", the vibration goes away. I checked the tranny bell housing, and there are no leaks or cracks. Any ideas?????
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Tardis
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Joined: 07 Aug 2004
Location: Ohio

PostPosted: Fri May 18, 2007 8:54 pm    Post subject: Reply with quote

Justplayinround wrote:
Any ideas?????

Be sure to check both axles.
The front driveshaft can cause vibration issues too.
Check the tranny mount.
Check the pinion shafts on the x-fer case and axles for bearing slop.
Rotate the driveshafts 180* and re-install them, do one at a time.
Try adding weights to the driveshafts with hose clamps.
This will tell you if the shaft needs rebalanced, usually they're fine.
Most of the time it's a bad tranny mount.
_________________
98' TJ, 99' XJ
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mattj
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Joined: 16 Feb 2007
Location: Jacksonville FL

PostPosted: Sat May 19, 2007 4:16 pm    Post subject: Reply with quote

you know that if you type alt+0186 you get .

Make sure the u joints were put in correctly.
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Justplayinround
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Joined: 17 May 2007
Location: Northern Virginia

PostPosted: Sun May 20, 2007 1:17 pm    Post subject: Reply with quote

I found the cause of the vibration!! Turns out that the "tabs" on the spline Yoke were worn away, well, one of them was. Now I gotta replace the Yoke. Thanks you all for the replies and the suggestions! I really appreciated the input!
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