Is some trackbar movement normal? - JeepForum.com
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post #1 of 26 Old 09-24-2017, 06:14 PM Thread Starter
Mopar4U
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Is some trackbar movement normal?

96 zj 5.2 limited

Trying to track down a mild thud noise when hitting rough terrain (offroad trails, my yard, pothole).

New moog trackbar
New moog sway bar links and inner bushings
New moog tie rod ends
New spicer upper and lower ball joints

It was mentioned that the moog trackbar bushing could be too soft and hitting the axle mount, here is a video. This look bad?

https://youtu.be/pJTs5xUOyA8

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post #2 of 26 Old 09-24-2017, 06:55 PM
GOLDWING
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You need to replace the bushing with a Moog poly 3 piece axle end bushing. Mine did the same thing. They are about $20 at O'Reillys.

GW

2 '98 4.0 ZJs
Hers is stock, mine, OME shocks, BB, Aussie, 2x6 sliders, 31s, etc.
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post #3 of 26 Old 09-24-2017, 06:56 PM
GOLDWING
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Put in a Moog 3 piece axle end poly bushing. $20 at O'Reillys.

GW

2 '98 4.0 ZJs
Hers is stock, mine, OME shocks, BB, Aussie, 2x6 sliders, 31s, etc.
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post #4 of 26 Old 09-24-2017, 07:05 PM
1996jz
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I'm having the same noise in my 4.0. Firestone told me I needed new CAs and quoted me $850...lmao. could CAs cause this noise?

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post #5 of 26 Old 09-24-2017, 07:13 PM Thread Starter
Mopar4U
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i can see how the 3 piece would tighten up my steering but i dont see how this movement causes a thud/clunk??

i havent done control arms either but not sure how to tell if they are bad. the upper bushing that needs to be pressed out and in the frame looks like a nightmare
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post #6 of 26 Old 09-24-2017, 07:21 PM
1996jz
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Idk either but for sure won't take anything to Firestone again. Jeep still doesn't roll straight after two alignments.

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post #7 of 26 Old 09-24-2017, 07:28 PM
azzkicker
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You probably have already, but you might check your skid plates to see if the bolts are tight. I've had clunking from that a number of times.

Are your new bushings poly now instead of rubber? In my opinion, poly clunks compared to rubber, but it lasts longer and seems cooler.

Anything can do that, loose wheel bearings, loose anything. I'd start by grabbing the top of the tire and shaking it in and out. See if you can make anything clunk. Then, get a strong friend and have them muscle the wheel back and forth while you lay under it (engine off, thus the strong friend).

Then, if still no clues, take a good look around at clearances, then jack up the rig and put jackstands under the frame, so the suspension hangs, and look again. Use a strong light. You can go as far as to leave one wheel down at a time, and do the same check.

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post #8 of 26 Old 09-24-2017, 07:38 PM Thread Starter
Mopar4U
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no skid plates on my rig
all my bushings are rubber i believe.

seems like ive been under my jeep more than driving it looking for this noise....,
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post #9 of 26 Old 09-24-2017, 07:57 PM
kg6mov
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Any play in the trackbar is a bad thing, that's much more than I would be comfortable with.

Have you loosened and retorqued all the bolts for the track bar bracket?


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Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #10 of 26 Old 09-24-2017, 09:59 PM
Timo_90xj
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Yeap, that's too much movement on a trackbar. Trackbar is about the only place where I can recommend poly bushings, unless you can find a rubber bushing that is hard enough. The one in your new Moog track bar certainly is a bit too soft.

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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***Under construction***
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post #11 of 26 Old 09-25-2017, 06:10 AM Thread Starter
Mopar4U
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Would this movement create any kind of noise when driving on rough terrain?
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post #12 of 26 Old 09-25-2017, 12:13 PM
kg6mov
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Yes, as the suspension is cycling the trackbar will probably clunk in the bracket.


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1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #13 of 26 Old 09-25-2017, 05:56 PM Thread Starter
Mopar4U
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do the 3 piece moog poly bushings need to be greased?
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post #14 of 26 Old 09-25-2017, 10:56 PM
GOLDWING
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Quote:
Originally Posted by Mopar4U View Post
do the 3 piece moog poly bushings need to be greased?
Nope.

GW

2 '98 4.0 ZJs
Hers is stock, mine, OME shocks, BB, Aussie, 2x6 sliders, 31s, etc.
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post #15 of 26 Old 09-25-2017, 11:29 PM
Timo_90xj
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I would use high quality grease on them, both to prevent premature wear and to keep them from squeaking.

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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