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Unread 10-04-2013, 06:16 PM   #1
Maximus_Daximus
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Grinding noise, changed everything, no clue

So a month or two ago the jeep started making this grinding noise like winding up gears, only did it when on the gas accelerating, cleaned both diffs out nothing wrong, rebuilt ds front and rear, swapped in a new tcase, new fluid in everything, and now the noise is still there. Any takes?

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Unread 10-04-2013, 06:55 PM   #2
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Rubbing tires??? Lol
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Unread 10-04-2013, 07:05 PM   #3
Duh
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Have you ruled out wheel bearings? Or even a diff bearing or ujoint? Or brakes of course.
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Unread 10-04-2013, 11:08 PM   #4
Cirruslydakota
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Quote:
Originally Posted by Duh View Post
Have you ruled out wheel bearings? Or even a diff bearing or ujoint? Or brakes of course.
Jack it up onto jack stands, spin each wheel by hand to isolate the noise. If you're having isolating it then pull the driveshafts and do it again.
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Unread 10-04-2013, 11:36 PM   #5
Maximus_Daximus
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I'm going to try that tomorrow,but my take is it only does it if I press on the gas to accelerate, once I take my foot off the gas and coast it the noise goes away
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Unread 10-05-2013, 02:13 PM   #6
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Jacked up the front, spun tires, no noise... Bout to try the rear
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current build 1999 wj [url]http://www.jeepforum.com/forum/f22/metal-mulisha-wj-1382820/[/url]

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Unread 10-05-2013, 02:31 PM   #7
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So jacked the front up, no noise anywhere, jacked the back up and all kinds of noises. I have an Aussie locker in the rear, so I'm use to the clicking when I turn, I can spin one when and hear something sliding around, spin the other and different clicking, both tires will only spin a little at the same time then only one. Could the locker be ****ed up?
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Unread 10-05-2013, 04:51 PM   #8
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I had the exact same symptoms you have, it was both my front wheel hub bearings. I had wobbley rough noise from drivers side and a fan belt sqeal from the pass side. Only on acceleration, also.

I did the wheel test I had no play and no noise. I had to take the jeep in for an alignment and new tires and my mechnic said that it is the hubs. He said without pressure/ weight on the wheels it can be hard to hear the worn bearings.

good luck


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Unread 10-06-2013, 08:15 AM   #9
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A noise that comes with acceleration and goes with deceleration is usually pinion bearings. If you pulled the covers and the gears look good it sounds like you caught it in time. Install new bearings and you should be good to go. You can test them by removing the driveshaft and wiggling the pinion yoke. There should be no up/down or side to side movement.
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Unread 10-06-2013, 08:40 AM   #10
Maximus_Daximus
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This is what I think I isolated it down to, bout to pop the rear diff off and check.

https://www.facebook.com/groups/wjje...1941925148659/
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current build 1999 wj [url]http://www.jeepforum.com/forum/f22/metal-mulisha-wj-1382820/[/url]

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Unread 10-06-2013, 10:42 AM   #11
Maximus_Daximus
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Popped the cover off, no metal shavings or parts, strained the fluid. This is what I came up with, both tires spin togeather at low speed, both tires spin when I turn the pinion, there no up or down movement in the pinion, however there's about a good 1/2" of play when spinning the pinion before it engages the tires to rotate.

https://www.facebook.com/groups/wjje...1943090393659/
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