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need help with cv diag/issues
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=88&t=82877		 Page 1 of 2
Author:  ksm45280 [ Tue Aug 18, 2015 10:50 pm ]
Post subject:  need help with cv diag/issues
Here is to start
knocking noise going strait under 15, turn wheel to either side and no change in sound sound goes away when applying brakes only and shaking at 65+
replaced left cv as I originally thought it was that. boots were fine
knocking came back after 100 miles. went ahead and pulled new left out to verify it wasn't doa, knocking continues after removal
put back new one and pulled right side, and the shaft came with it, looked great boots no issues, test drive knocking continues

could it be the front drive shaft cv end? or the ujoint end of that shaft failing? I'm needing help figuring this out
Author:  ksm45280 [ Tue Aug 18, 2015 11:22 pm ]
Post subject:  Re: need help with cv diag/issues
also I did confirm with a friend of mine who is a mechanic that it sounds like a broken cv somewhere when I was driving in a parking lot the other day
Author:  PALiftedKK [ Tue Aug 18, 2015 11:53 pm ]
Post subject:  Re: need help with cv diag/issues
post a video :2cents: :2cents:
Author:  ksm45280 [ Wed Aug 19, 2015 12:05 am ]
Post subject:  Re: need help with cv diag/issues
Will do in the morning
Author:  ksm45280 [ Wed Aug 19, 2015 10:08 am ]
Post subject:  Re: need help with cv diag/issues
http://youtu.be/iQMwX2Jaetg

This is what I got this morning as I was running late to work, couldn't get a longer video or louder
Author:  Gageraid [ Wed Aug 19, 2015 11:28 am ]
Post subject:  Re: need help with cv diag/issues
Wow, that's pretty loud!
I'm surprised you can't pinpoint it.
Does the sound change if you are in neutral? Does it do it in reverse?
No grease anywhere?
Author:  NAMoulton1 [ Wed Aug 19, 2015 11:53 am ]
Post subject:  Re: need help with cv diag/issues
I'd pull the half shafts and see if the noises go away. I recently thought I broke a CV joint but it turns out my front diff exploded. Where do you feel the popping noise coming from?
Author:  ksm45280 [ Wed Aug 19, 2015 12:17 pm ]
Post subject:  Re: need help with cv diag/issues
It does it in neutral with a little less noise , no grease anywhere, it doesn't do it in reverse. To me it feels like it's front end left,
Author:  Gageraid [ Wed Aug 19, 2015 12:26 pm ]
Post subject:  Re: need help with cv diag/issues
Can you feel anything through the floor?
Author:  ksm45280 [ Wed Aug 19, 2015 1:18 pm ]
Post subject:  Re: need help with cv diag/issues
No I don't feel vibrations through the floor, when at 60+ the vibration was more steering wheel then car shaking, but I haven't been back on highway with it or even driven it since testing with each half shaft out individually and the quick little drive this am
Author:  Gageraid [ Wed Aug 19, 2015 1:21 pm ]
Post subject:  Re: need help with cv diag/issues
How much lift are you running and what size tires?
Author:  Scar0 [ Wed Aug 19, 2015 3:40 pm ]
Post subject:  Re: need help with cv diag/issues
Grab the drive line from the X-fer case to axle and see if it has play in it by the X-fer case pot/pan.
Author:  PALiftedKK [ Wed Aug 19, 2015 6:22 pm ]
Post subject:  Re: need help with cv diag/issues
The noise did not match anywhere close to the rpms. Sounds like something is "shimmying" left to right. Have someone rev the engine while in neutral and check the transmission and power steering.

If the noise is presient while in a standstill neutral, id doubt there's an issue with the differentials. If you have power (slippage) in neutral you have one big issue on hand.
Author:  ksm45280 [ Wed Aug 19, 2015 6:43 pm ]
Post subject:  Re: need help with cv diag/issues
its the crapstar currently, with 245/7516 bfg ko2
Author:  Gageraid [ Thu Aug 20, 2015 1:08 am ]
Post subject:  Re: need help with cv diag/issues
Maybe something with the springs? How many miles on it?
Author:  ksm45280 [ Thu Aug 20, 2015 7:07 am ]
Post subject:  Re: need help with cv diag/issues
it says 119k but it's more, due to the fact that the tire size has never been corrected and I don't know how long the spacer kit was on it before I bout it at 80
I was wanting to at least buy the front half of a lift and then replace the back in a month or so
Author:  Gageraid [ Thu Aug 20, 2015 8:41 am ]
Post subject:  Re: need help with cv diag/issues
Your springs and shocks are probably toast.
I don't know if it would cause these noises, though.
Author:  NAMoulton1 [ Thu Aug 20, 2015 9:56 am ]
Post subject:  Re: need help with cv diag/issues
Gageraid wrote:
Your springs and shocks are probably toast.
I don't know if it would cause these noises, though.


It does, but not in this form. He'll be getting a bouncing tire after hitting bumps and hard bump-steering.


OP, does this noise happen per tire rotation or is it rhythmically but not perfect with the tire?
Author:  ksm45280 [ Thu Aug 20, 2015 10:56 am ]
Post subject:  Re: need help with cv diag/issues
https://instagram.com/p/6m_r8UNGIF/?taken-by=ksm45280
um yea finally looking closely at the front drive shaft, I'd say that the cv end is what the issue is... :shock: :shock: :shock:

so whats the easiest way to pull it with the exahust pipe so close

and I know I have seen the kit before to replace that end but I forget where
Author:  Gageraid [ Thu Aug 20, 2015 11:16 am ]
Post subject:  Re: need help with cv diag/issues
Yup. That's your problem.
That's something I look at every time I'm under the Jeep cuz I've seen quite a few fail on the forums.
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