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Clunk! When driving after R to D shift

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Old 02-11-2012, 12:19 PM
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Default Clunk! When driving after R to D shift

So, just like the title says, i'm having a clunk when i drive, after reversing and then shifting from R to D. I don't if it's coming from the rear differential or the transmission.
It's like after reversing, gears 'clunk!' when driving forward.
Has anyone have this noise before? Is this normal? I don't remember listening it from the beginning.
Mine is an auto JKU 2010, with stock gears.
Old 02-11-2012, 12:58 PM
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Someones going have to look under the jeep while you shift it from reverse to drive to see where the play is coming from. Could be u-joints, rear or trans.
Old 02-11-2012, 01:04 PM
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Its probably worn out U-joints
Old 02-11-2012, 01:57 PM
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Originally Posted by Rich6700
Someones going have to look under the jeep while you shift it from reverse to drive to see where the play is coming from. Could be u-joints, rear or trans.
The clunk is not when shifting, but when i press the gas and start moving, as the jeep starts moving, then there's the clunk... Still u-joints apply?
Old 02-11-2012, 02:02 PM
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Sounds like the trans.
Old 02-11-2012, 02:03 PM
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Originally Posted by bingote
The clunk is not when shifting, but when i press the gas and start moving, as the jeep starts moving, then there's the clunk... Still u-joints apply?
u joints go bad and as long as you take your time they are easy to install.. An easy/cheep fix, check your emergency brake as well. I cant hear the clunk but I know for a while i had a loud/audible click or clunk and once i tore it down i noticed it was in the drums of the emerg brake assy. It was russted and the adjusters were hanging up. But u-joints aren't uncommon to have issues with. I have replaced both.Good luck
Old 02-11-2012, 06:08 PM
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X3 on the driveshaft U-joints, though there's only one on the front OEM shaft at the diff end & none on the rear OEM one (CV's only on the SWB anyway) if I'm not mistaken? Excessive play/lash in the diff can also cause a clunk when changing direction.
Old 02-11-2012, 06:30 PM
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Do you have larger than stock tires on it, that usually puts added stress on the u-joint, the stock ones are not that great.
Old 02-11-2012, 08:09 PM
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Originally Posted by JKlad
Excessive play/lash in the diff can also cause a clunk when changing direction.
That's what i "feel" is happening. I'm gonna try to take a look with a friend tomorrow.
Don't know how to get down there to look/listen as someone drives the jeep forward :/
Old 02-11-2012, 08:10 PM
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Originally Posted by warvuk
Do you have larger than stock tires on it, that usually puts added stress on the u-joint, the stock ones are not that great.
Noup. Stock Rubi tires.


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