My rear clunk is coming from my transfer case? - JeepForum.com
 
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post #1 of 5 Old 01-12-2014, 09:30 PM Thread Starter
jm8881
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1996 ZJ 
 
Join Date: Oct 2005
Location: Palm Desert
Posts: 823
My rear clunk is coming from my transfer case?

At least I think it is. I've had a clunk/thud that sounds like something is moving around in my cargo or back seat area since I bought the jeep. I figured it would go away when I did my 4.5" iro lift. It didn't.

I found that if you bounce the back bumper up and down a few inches you could get it to make the noise only much more softly than when you drive it.

I got my neighbor to bounce the bumper while I was under the jeep so that I could find the problem. I found out that the noise and thud are coming from the tcase. You can feel the thud in the driveshaft and tcase but not in any part of the suspension. The driveshaft only moves into the tcase about 1/4" since the suspension is only being compressed a couple inches. Also I can't seem to get it to make any noise or thuds by grabbing the drive line and trying to move things.

At first when I found all this I thought the ujoints were bad but I don't get any typical ujoint problems (vibration on decel, loose driveshaft, etc).

Anyone ever experience this?

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post #2 of 5 Old 01-12-2014, 09:40 PM
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Definitely sounds like either the U-joints or the slip joint needing grease. Mine was the slip joint, clunked on take-offs.

Poop
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post #3 of 5 Old 01-12-2014, 09:52 PM Thread Starter
jm8881
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1996 ZJ 
 
Join Date: Oct 2005
Location: Palm Desert
Posts: 823
Quote:
Originally Posted by JasonStebbins View Post
Definitely sounds like either the U-joints or the slip joint needing grease. Mine was the slip joint, clunked on take-offs.
Well mine doesn't clunk on takeoff, only makes noises when you hit a bump. I'll pull the driveshaft soon and check things out. Hopefully it's something small like the ujoints, I wasn't planning on a tcase swap anytime soon.
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post #4 of 5 Old 01-12-2014, 09:58 PM
JasonStebbins
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1997 ZJ 
 
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Check the condition of the transmission mount to, it's in that general area.

Poop
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post #5 of 5 Old 01-13-2014, 09:29 AM
speedbucket
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1993 ZJ 
 
Join Date: Jan 2011
Location: chesapeake
Posts: 3,562
check the transmission mount, ujoints, and make sure the mating splines of the tcase/driveshaft are lubricated

http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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