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Old 07-22-2013, 12:56 PM   #1
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Driveline slack?

Just wondering how much slack/play in the front driveshaft is normal?

I'm asking as I have been getting a soft clunk sound when I accelerate (don't notice it always but often). It sounds like it is coming from the center, maybe slightly to the rear of the Jeep. I checked under the Jeep and there is no play in the rear driveshaft, but there is some in the front driveshaft.

It is in 2wd when the noise is happening (haven't tried it in 4wd yet as it is summer) so I am lost as to what is causing it - I figured it was some play in the rear shaft.

Thanks.

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Old 07-22-2013, 01:14 PM   #2
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Normal

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Old 07-22-2013, 04:20 PM   #3
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Quote:
Originally Posted by kjeeper10 View Post
Normal
The slack is normal, correct?

Is the noise normal too?
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Old 07-22-2013, 04:22 PM   #4
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Yes.. The front is where the noise is coming from. I have a 6 speed. Until my shifting got smoother, it would clunk.
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Old 07-22-2013, 04:25 PM   #5
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OK, mine is an automatic, does that make a difference at all?

I've never owned another vehicle that made so many noises as this thing.
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Old 07-22-2013, 04:33 PM   #6
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Haha ... Feel ya. The jeep is pretty noisy.

When In 2wd your front DS is not under load, the slop is just backlash in the diff gears.
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Old 07-22-2013, 04:36 PM   #7
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I get this same noise/feel too in my automatic. Haven't had if for awhile but it happens. I have to put it in neutral and see if its the rear driveshaft. I only have 12,000 on mine so I can't see it being u-joint or anything
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Old 07-22-2013, 04:52 PM   #8
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Some turning play is normal. Up and down play is not
Clunk sound may be a U-joint
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Old 07-22-2013, 05:20 PM   #9
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Quote:
Originally Posted by Curtis97Tj View Post
Some turning play is normal. Up and down play is not
Clunk sound may be a U-joint
Or ball joints but looks like his jeep is new.
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Old 07-22-2013, 05:41 PM   #10
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Yea. 2010 jeep shouldnt need ball joints. U-joint another story if he been out wheeling it. But usually U-joints when they begin to go bad. Sounds like a bunch of birds chirping under the jeep. Mine were completely broken on rear DL so they did clunk. Had the whole CV replaced was $160 at DL shop
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Old 07-22-2013, 05:48 PM   #11
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Originally Posted by Curtis97Tj View Post
Yea. 2010 jeep shouldnt need ball joints. U-joint another story if he been out wheeling it. But usually U-joints when they begin to go bad. Sounds like a bunch of birds chirping under the jeep. Mine were completely broken on rear DL so they did clunk. Had the whole CV replaced was $160 at DL shop
Haha... The JK's ball joints suck.
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Old 07-22-2013, 06:20 PM   #12
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I haven't had it out wheelin but I did buy it used. I can't imagine it was offroad much if at all though as it is in pretty pristine shape and was all stock when i bought it two months ago. It has 65k miles on it now.
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Old 07-22-2013, 06:23 PM   #13
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just watch a JK wheeling video or five (the ones who don't add music) and you'll hear the common sound they make, or listen to other folks on the trail --- just so you have a reference noise to compare yours maybe

edit- to be clear, i'm talking about the driveline slack noise
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Old 07-22-2013, 06:23 PM   #14
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Quote:
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I haven't had it out wheelin but I did buy it used. I can't imagine it was offroad much if at all though as it is in pretty pristine shape and was all stock when i bought it two months ago. It has 65k miles on it now.
Same here. My was a 07 but with only 34k
Replaced my joints at 45k with little off roading.
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Old 07-22-2013, 06:42 PM   #15
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Dumb question but what u joints are you guys tslking about replacing? Front axle? My rear driveshaft looks like this.
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Old 07-22-2013, 06:46 PM   #16
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Axle u-joints. Those are rzeppa (CV) joints.
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Old 07-22-2013, 07:18 PM   #17
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Yes. My rear has SYE. CV or cardan U-Joints

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