Clanking Noise in Driveline?

BaddestCross

BaddestCross

Active Member
So I'm sitting here waiting for a tow truck... The Jeep has a noise that may be coming from the transmission, but I'm not sure. I've had a whine that I've been hearing for awhile that I thought was the rear pinion bearing, but now it's a whine on acceleration that turns into a rotational clunk at deceleration that gets louder under engine braking and downshifting.

When I put the trans in neutral I'm pretty sure it goes away (hard to be [emoji817] with all the noise around me), and it's definitely not coming from the engine because there's nothing when I just rev the engine.

Bottom line is, I'm not sure if it's the trans, transfer case, or dif gears... I was gonna pull the front driveshaft, but it started pouring rain out here so I called for a tow instead.

Hopefully I described the circumstances clearly enough... Anyone have any ideas of where to look or what it might be?




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Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407
 
I had a rotational clunk sound, on deceleration. that drove me nuts trying to find. I was convinced it was in the transmission. Ended up being the rear pinon baring. It was echoing up the driveline.


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Sucks to hear that James.

If I had to guess based on the description, I would be with black pearl thinking pinion bearing.

I hope you can get going soon.
 
Alternate taking out the drive shafts and driving around. If it’s a driveshaft or pinion bearing, that will help you isolate it, front vs rear . I’m going to guess pinion bearing or pinion flange, probably rear.


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Hope you get it fixed quickly and easily. If you have the extra funds and are going to do the repair yourself, a Chassis Ear Toolset is a great tool to have to find shit like this. Not cheap but very useful.
 
Well, pinion bearing would fit with my original thoughts. It sure sounds like it's coming from the front, but past experience tells me that you're right about sounds traveling through the driveline.

I made it home safely with Fiona on the flatbed... Hopefully I can find the time and motivation this weekend to do your driveshaft test, Greer.




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Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407
 
WJCO said:
Hope you get it fixed quickly and easily. If you have the extra funds and are going to do the repair yourself, a Chassis Ear Toolset is a great tool to have to find shit like this. Not cheap but very useful.
Click to expand...
Thanks for the recommendation... Assuming I don't have this tool and I'll more than likely be alone, Is there a way to determine a bad bearing without tearing everything apart?



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Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407
 
Depends on how bad it is.

If it's bad enough to make that kind of racket, the yolk may be loose enough to move either by hand or with a small bar.

I would start by pulling the rear driveshaft. Pay attention to the u-joints as you take it off, and check for looseness in the yolk. A bad pinion bearing will usually leak some oil as well.
 
jdofmemi said:
Depends on how bad it is.

If it's bad enough to make that kind of racket, the yolk may be loose enough to move either by hand or with a small bar.

I would start by pulling the rear driveshaft. Pay attention to the u-joints as you take it off, and check for looseness in the yolk. A bad pinion bearing will usually leak some oil as well.
Click to expand...
Thanks. I'm assuming you mean that it will move in and out, not rotational?




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Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407
 
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