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ZJ and WJ Grand Cherokees (1993 - 2004) Technical forum for the classic ZJ and WJ Grand Cherokees.

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Old June 3rd, 2019, 21:41
ZJTROY ZJTROY is offline
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Join Date: May 2017
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Drive line vibrations

Had a growling noise on acceleration found i had a collapsed passenger side motor mount (see pic) replaced it now there is a bad drive line vibration at 60 to 70 MPH. Drive line angle is correct took out drive shaft and run with it off you can still feel it. Almost like transfer case or trans issue. Has anyone seen this before I start digging into it with both shovels?

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Old June 4th, 2019, 08:12
smokeyyank's Avatar
smokeyyank smokeyyank is offline
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Re: Drive line vibrations

You could have a bad tranny/tcase mount. If your motor mount was shot it's going to place that stress somewhere else along the driveline. If you eliminated bad ujoints/driveshafts by pulling them the mounts would be the area I'd look next.

P.S. pic never showed up
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Old June 5th, 2019, 20:02
trippled trippled is offline
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Re: Drive line vibrations

Specs on this? Assuming this is 4wd, which shaft did you pull? Did you check the other? How does it feel like driveline vibe? Any chance it's tire balance?
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Old June 7th, 2019, 12:35
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PacificEd PacificEd is offline
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Location: Middle Tennessee
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Re: Drive line vibrations

Is it rotational? I have a vibe that only occurs between 45 to 50 mph. I've been thinking it's a front drive shaft.

If you removed the front driveshaft and it's still there, I'd look at the other engine mounts, front axle joints, and the rear driveshaft u-joints.
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