Horrible shaking sometimes when hitting bump in road.... - JeepForum.com
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post #1 of 5 Old 05-27-2020, 02:48 AM Thread Starter
Bdrew
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Horrible shaking sometimes when hitting bump in road....

So I'll be driving and sometimes when I hit a pothole, railroad tracks or some other sort of bump in road the Jeep will start shaking horribly and doesn't seem to stop until I slow down to under 25 mph... Any ideas on what the cause might be or how I might fix this??


Any help would be much appreciated...


Thx


-B

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post #2 of 5 Old 05-27-2020, 02:49 AM Thread Starter
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Oh forgot to mention this is on a 1995 grand Cherokee ZJ 4.0 V6 4 wheel drive
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post #3 of 5 Old 05-27-2020, 03:20 AM
Timo_90xj
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I suggest looking under the hood, it's not a V6 but an inline..

As for the shaking, you're experiencing death wobble. Most common cause especially on a stock height Jeep is worn front trackbar (bushing and/ or rod end), or trackbar bracket mounting hole ovalized.
Other causes for DW are worn TREs, bad shocks, incorrect steering and suspension angles, uneven tire wear, unbalanced tires, incorrect tire pressure, etc..

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...


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1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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post #4 of 5 Old 05-27-2020, 07:23 AM
LordHobbit
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Please fill out your Jeep profile. You can see Timo's profile just under the image of his awesome Jeep. This will help us help you.

Grab a buddy. Or two, whatever. Without starting the engine, have one buddy sit in the driver seat. Crawl under the front end of the Jeep and while buddy turns the steering wheel left and right and back again and again and again ... look for any joints in the suspension and steering that don't move like they should. No joint should have slack in it. Take some notes on what joints are moving incorrectly. Those are the parts that NEED replacement. Very likely all wear parts should be replaced and possibly some things will need repaired that can't be replaced (cue the trackbar mount holes). Check the control arms as well. They are less likely culprits, but don't discount them.

Hope you have a bit of savings. Kolak and/or Rockauto can be your friend. [email protected] or pm here. Rockauto.com

In your favorite internet search engine, search for "death wobble" and you'll find millions of results. The best advice will come to you on this thread.
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93 red ZJ 196k 4.0. Spent more money than I should have ...
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post #5 of 5 Old 05-27-2020, 11:50 AM
Timo_90xj
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Like Lordhobbit mentioned, have a friend/ relative turn the steering wheel left-right-left with the engine off - you under the Jeep feeling every joint and bushing in the steering linkage and trackback with your hands. Visual check is not enough, you need to get your fingers dirty so you can feel where the play is.

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...


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1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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