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Unread 12-29-2009, 12:47 PM   #1
jdanilson
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terrible clunk and lurch when starting. 2006 auto wrangler unlimited

My 2006 wrangler unlimited (33K miles) with automatic has just started having a problem. It occurs when starting from a dead stop and accelerating to 1 or 2 mph at which point there is a terrible clunk (metal on metal) sound from the rear and a jerk. Both times I thought I had been rear-ended! It's definitely not the brakes and I'm guessing it's in the differential.

It first occurred on 12/24. It occurred again on 12/27. So only two times but I've been doing lots of driving. Both times were nearly identical. I was stopped at a light and started accelerating. If it makes a difference, I've been doing a lot of 4H driving here due to snow but in both of these situations I was in 2H mode. (I've done some limited off-road driving but none recently; the last time was back in August 2008.)

I'm taking it to the dealer on Thursday (12/31) but hate to go there with an undiagnosed issue.

Thanks in advance for any ideas.

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Unread 12-29-2009, 12:56 PM   #2
99TJSahara
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wrong section, you have a tj
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Unread 12-29-2009, 01:03 PM   #3
JeffinWesternWA
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Sounds like U joints, can be differential (low fluid or other problem), are you sure it's "center" of the rear, not either rear wheel area?
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Unread 12-29-2009, 02:03 PM   #4
jdanilson
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sorry about posting in the wrong group. should I move it?

As to the question it's hard to tell but I'm reasonably certain it's from the rear and I can't favor either side.
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Unread 12-29-2009, 02:15 PM   #5
1222
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Originally Posted by jdanilson View Post
sorry about posting in the wrong group. should I move it?
Youíre fine. Itís all related.

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Originally Posted by jdanilson View Post
As to the question it's hard to tell but I'm reasonably certain it's from the rear and I can't favor either side.
When you find out the problem let us know if you happen to go to the TJ section though. At least, Iím curious.
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Unread 12-30-2009, 09:32 AM   #6
calemasters
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Originally Posted by jdanilson View Post
My 2006 wrangler unlimited (33K miles) with automatic has just started having a problem. It occurs when starting from a dead stop and accelerating to 1 or 2 mph at which point there is a terrible clunk (metal on metal) sound from the rear and a jerk. Both times I thought I had been rear-ended! It's definitely not the brakes and I'm guessing it's in the differential.

It first occurred on 12/24. It occurred again on 12/27. So only two times but I've been doing lots of driving. Both times were nearly identical. I was stopped at a light and started accelerating. If it makes a difference, I've been doing a lot of 4H driving here due to snow but in both of these situations I was in 2H mode. (I've done some limited off-road driving but none recently; the last time was back in August 2008.)

I'm taking it to the dealer on Thursday (12/31) but hate to go there with an undiagnosed issue.

Thanks in advance for any ideas.
Do you also det an engine flair? If so, check the auto transmission fluid level. But since you indicated a metal on metal noise, it may be a loose rear axle / suspension link connection or bushing. Also, could be something like a loose or broken transmission mount.
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Unread 07-14-2013, 09:26 AM   #7
jdanilson
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No update to this since it has not recurred. I had my mechanic check for u joints or differential oil levels. Everything is fine. I guess I just have to wait.
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Unread 07-14-2013, 10:48 AM   #8
jmb6420
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Dang man, after 3 1/2 years I'd say it is solved.
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Unread 07-15-2013, 03:24 AM   #9
tankinyj
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Dang man, after 3 1/2 years I'd say it is solved.
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