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post #1 of 8 Old 06-20-2015, 01:28 PM Thread Starter
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Driveline vibration

I done a regear on my 08 jk x Dana 30 front and developed a vibration when I remove shaft it is gone checked the pinion flange and it has a .05 wobble to it Yukon gears and master install kit all new bearings what could be my issue?
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post #2 of 8 Old 06-20-2015, 01:41 PM Thread Starter
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Everything is setup right correct bearing preload and replaced pinion flange still out
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post #3 of 8 Old 06-20-2015, 05:59 PM
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Did you do the install or some one else do it ? Are you saying that you have 500 ths runout or the shaft moves that much side to side in the pinion bearing. when moved manually .
I have never seen it but I've heard that a mistake by the installer , by leaving the set-up bearing in , and not replacing it with the new bearing has resulted in the description your describing .
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post #4 of 8 Old 06-20-2015, 10:02 PM Thread Starter
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I meant 5 thousands I did the install and didn't leave set up bearing on I checked and made sure I had it out even got breakin done and pattern and backlash still good no unusual wear at all I am lost on it
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post #5 of 8 Old 06-21-2015, 09:30 AM
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If you're certain of the setup then the issue is in the flange itself. Would be virtually impossible to machine the pinion & splines off by that much. FWIW, I chased something like that a few years ago and discovered the yokes supplied with my aftermarket driveshafts had the seats for the u-joints machined 1-2 mm off center.


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post #6 of 8 Old 06-21-2015, 12:04 PM Thread Starter
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I changed the stock flange to another stock new flange and still was the same about of wobble to it there is no play that I can feel to it I'm wondering if it's possible a bad pinion or bearing?
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post #7 of 8 Old 06-21-2015, 08:49 PM Thread Starter
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I'm just gonna pull it back apart and check bearings and races and see what I come up with but its like the flange is warped no play that I can feel in the pinion so we shall see
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post #8 of 8 Old 06-28-2015, 10:12 PM Thread Starter
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Well pulled it back apart today and it was pinion bearing I guess I got a bad one out of the Yukon master install kit replaced with timken bearings and no vibrations at all
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