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Old 07-05-2019, 09:10 PM
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Slow speed clunk sound!?!?

2015 unlimited Sahara. At speeds around 10mph+- I have a clunk, clunk, clunk sound that speeds up and slows down with the speed of the tires. It’s at the same frequency as if I had a rock in the tire, a clunk every revolution. It’s not very loud and you can kind of feel it lightly in the steering wheel. Didn’t start until I put new tires one and about 500 miles in, now 2000 miles on tires and still the same. Tires are wild country 12.5x31r17 lt. Had two different tire shops look at the tires and even had Jeep dealer just rotate and balance, still has slight shake at 50mph. Jeep drives good but about to go on a long trip and don’t want to break down.

Has anyone had this issue, if so any help would be appreciated.

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Old 07-08-2019, 01:43 AM   #2
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I had the exact same type noise. Checked gears, bearings,etc. It ended up being the new truetrac diff i put in. Luckily it went away for me after several hundred miles.

https://www.wranglerforum.com/f202/j...t-2365719.html

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Old 07-08-2019, 04:18 AM   #3
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Originally Posted by Rayzor25 View Post
I had the exact same type noise. Checked gears, bearings,etc. It ended up being the new truetrac diff i put in. Luckily it went away for me after several hundred miles.

https://www.wranglerforum.com/f202/j...t-2365719.html
Did you switch to a gear lube that doesn't have friction modifier? They can act funny with modifier in the lube.

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Old 07-08-2019, 10:24 AM   #4
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Rezappa joint in front driveshaft going bad? If it's rotational and you have ruled out the tires that would be my next guess.....
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Old 07-10-2019, 02:35 AM   #5
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Did you switch to a gear lube that doesn't have friction modifier? They can act funny with modifier in the lube.

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No. Using same lube (Dino 85-140w without LS additives). Getting hard to find gear lube without friction modifiers around here tho.
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Old 07-11-2019, 08:22 PM   #6
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No. Using same lube (Dino 85-140w without LS additives). Getting hard to find gear lube without friction modifiers around here tho.
It really is, isn't it? I had a hell of a time finding it hear when I had the TT's in my TJ

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Old 07-13-2019, 09:33 AM
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Rezappa joint in front driveshaft going bad? If it's rotational and you have ruled out the tires that would be my next guess.....
How could I test and see if this is the problem myself without taking it to the dealer? Due to the lift that was on it when I bought it the warranty is out.
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Old 07-13-2019, 10:04 AM   #8
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How could I test and see if this is the problem myself without taking it to the dealer? Due to the lift that was on it when I bought it the warranty is out.
A lift in itself does not void a warranty. The dealership can only deny warranty work if the defective product could be a result of your aftermarket modifications. https://www.consumer.ftc.gov/article...ne-maintenance

I have used this law with both Jeep and Chevy. Both tried to deny warranty work because of aftermarket modifications, both had managers side with me when I presented case law.
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Old 07-15-2019, 07:28 AM   #9
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How could I test and see if this is the problem myself without taking it to the dealer? Due to the lift that was on it when I bought it the warranty is out.
Best way is to take off the front driveshaft and rotate the joints by hand to feel if they are smooth or if you feel them grinding as you rotate them. My back one just had an issue and it looked perfectly fine until I rotated the end that mounts to the transfer case by hand and then I could feel how the ball bearings in there were grinding.

And while it is off take the Jeep for a drive and see if the vibration went away.

Good luck on your project......
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