Roaring grinding noise - JeepForum.com
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post #1 of 15 Old 08-18-2017, 10:17 PM Thread Starter
Clodhopper
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Roaring grinding noise

06 TJ Rubicon has noise coming from drive train that sounds like forward of transmission. Through all gears but goes away when clutch is pushed in. 4.0, 5 speed manual (AX15) that replaced NSG 370 that died, 241OR transfer case. Any ideas?

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post #2 of 15 Old 08-19-2017, 11:15 AM Thread Starter
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Ok, someone has to have an idea or suggestion here!

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post #3 of 15 Old 08-19-2017, 01:35 PM
Poppy360
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Describe the noise...


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'98 TJ Sport 4.0L
RE 3.5" Long Arm w/ 1"BL; 35" KM2's; 8.8; HP30; 4.88's; Dual ARB's; Warn HS9500i; OME Shocks; CO2; Fully Armored; ORO U-Turn Steering; LoD Rear Bumper/Tire Carrier; Durango Steering Box; Heated Seats
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post #4 of 15 Old 08-19-2017, 04:55 PM
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Noises underneath often sound like they're coming from a different spot than where they are actually coming from.

I had a "roaring grinding noise" not too long ago that was actually a failed u-joint in the double-cardan side of my rear driveshaft. This could be what you have (it could go away when you push in the clutch because you are taking all load off the driveline). My recommendation to you would be to remove your rear driveshaft, and drive around in front wheel drive (need to put it in 4Hi to do this) and see if the noise goes away.
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post #5 of 15 Old 08-19-2017, 05:21 PM Thread Starter
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Kinda like a growl, goes away completely when I push in the clutch!

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post #6 of 15 Old 08-19-2017, 05:23 PM Thread Starter
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Not real loud. By the way, have new clutch, throwout bearing, pilot bearing and trannie!

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post #7 of 15 Old 08-19-2017, 05:24 PM
UnlimtedRubi06
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Check driveshaft double Cardon joints.

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post #8 of 15 Old 08-19-2017, 05:27 PM Thread Starter
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Originally Posted by Clodhopper View Post
Not real loud. By the way, have new clutch, throwout bearing, pilot bearing and trannie!

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And front driveshaft is removed!

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post #9 of 15 Old 08-19-2017, 07:57 PM Thread Starter
Clodhopper
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Quote:
Originally Posted by JEK3 View Post
Noises underneath often sound like they're coming from a different spot than where they are actually coming from.

I had a "roaring grinding noise" not too long ago that was actually a failed u-joint in the double-cardan side of my rear driveshaft. This could be what you have (it could go away when you push in the clutch because you are taking all load off the driveline). My recommendation to you would be to remove your rear driveshaft, and drive around in front wheel drive (need to put it in 4Hi to do this) and see if the noise goes away.
Have a fairly new "Tom Woods" rear DS (less than 2k miles but I'll check it.....thanks!

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post #10 of 15 Old 08-19-2017, 11:23 PM
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Quote:
Originally Posted by Clodhopper View Post
Have a fairly new "Tom Woods" rear DS (less than 2k miles but I'll check it.....thanks!
Can't hurt to rule out the easy things.
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post #11 of 15 Old 08-19-2017, 11:37 PM Thread Starter
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Can't hurt to rule out the easy things.
Yep, that one's easy and quick!

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post #12 of 15 Old 08-20-2017, 01:17 PM
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Yep, that one's easy and quick!
Free, too! Except for a little time, that is.
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post #13 of 15 Old 08-20-2017, 09:17 PM Thread Starter
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Free, too! Except for a little time, that is.
Ta Daa! Centering ball on the double carden joint of the rear driveshaft! Felt kinda loose when I removed the shaft, drove it and it was quiet as a mouse (well, as quiet as my jeep is gonna get but no roaring/grinding noise)! Thanks guys (especially JEK3), now to fix it!

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post #14 of 15 Old 08-21-2017, 05:05 AM
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Quote:
Originally Posted by Clodhopper View Post
Ta Daa! Centering ball on the double carden joint of the rear driveshaft! Felt kinda loose when I removed the shaft, drove it and it was quiet as a mouse (well, as quiet as my jeep is gonna get but no roaring/grinding noise)! Thanks guys (especially JEK3), now to fix it!
Denny's Driveshaft sells kits with all the parts you need (Spicer brand) at reasonable prices.
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post #15 of 15 Old 08-22-2017, 12:13 PM
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Originally Posted by Clodhopper View Post
Kinda like a growl, goes away completely when I push in the clutch!

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It is strange that is was the driveshaft, especially after this comment. The shaft spins even in neutral (or with clutch pressed). Must have only been doing it with a bit of load.

I would have suspected faulty Throwout bearing if noise goes away with Clutch pressed.

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