Shimmy at 50 mph - JeepForum.com
 
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post #1 of 10 Old 09-07-2019, 05:59 PM Thread Starter
jhrebs
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Shimmy at 50 mph

Just noticed this today. Have not done anything to my front end. Iím thinking alignment, ball joints, tie rod ends, wheel bearings?

Not sure how to check these as opposed to just replacing.


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'87 reg. historic, 2" bds springs, 1" boom shackles, 1" daystar BL, 31" Intereco trxus, Crager soft 8's, steel braided brake extensions, monsta liner
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post #2 of 10 Old 09-07-2019, 09:55 PM
bruinjeeper
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Ball joints: Jack up your front end...one side at a time. Grab the tire in the air at 12 and 6 and push n pull alternating top and bottom check for excessive play.

Tie rods/steering linkage rod ends: grab the bars and shake them real hard. Note any excessive play.

Alternate testing: have someone sit in the driver seat and turn lock to lock. Study the rod ends as this happens keeping note of the pitman arm. Any movement before or at a spot in the rotation where the tires are not turning but the rods are movin? Even a little too much play can mean big effects at highway speeds. Then crawl under your rig and look at the shaft... having your partner turn the wheel, any twisting? (U joints done...).

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #3 of 10 Old 09-07-2019, 09:56 PM
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Other than this... tire PSI, wheels out of balance... etc.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
~YJOTM JULY '19~
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post #4 of 10 Old 09-08-2019, 04:48 AM Thread Starter
jhrebs
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Quote:
Originally Posted by bruinjeeper View Post
Then crawl under your rig and look at the shaft... having your partner turn the wheel, any twisting? (U joints done...).

Steering shaft or driveshaft?




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'87 reg. historic, 2" bds springs, 1" boom shackles, 1" daystar BL, 31" Intereco trxus, Crager soft 8's, steel braided brake extensions, monsta liner
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post #5 of 10 Old 09-08-2019, 04:56 AM
Ross
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Do you feel it in you seats or the steering wheel?

It in the steering wheel:
It doesn't hurt to check your ball joints, hubs or TREs but if it is just at that speed my bet is tires. Wear or out of balance.

Rotate them and see if there is any difference.

In the seat maybe drive shaft. Remove them one at a time and see if that makes any difference.

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post #6 of 10 Old 09-08-2019, 07:41 AM Thread Starter
jhrebs
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Shimmy at 50 mph

I feel it slightly in the seat but definitely in the steering wheel and a little bit in the gas pedal. Ball joints are two years old. Moog. But I do rough rock crawling a couple times a year.

Iíll just check it all.


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post #7 of 10 Old 09-08-2019, 08:00 AM
bruinjeeper
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Quote:
Originally Posted by jhrebs View Post
Quote:
Originally Posted by bruinjeeper View Post
Then crawl under your rig and look at the shaft... having your partner turn the wheel, any twisting? (U joints done...).

Steering shaft or driveshaft?




Sent from my iPhone using Tapatalk
Steering

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
~YJOTM JULY '19~
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post #8 of 10 Old 09-08-2019, 08:07 AM Thread Starter
jhrebs
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Lower steering shaft is a month old. Brand new.


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'87 reg. historic, 2" bds springs, 1" boom shackles, 1" daystar BL, 31" Intereco trxus, Crager soft 8's, steel braided brake extensions, monsta liner
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post #9 of 10 Old 09-08-2019, 12:57 PM
Chrisnvegas
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You can check alignment at home. (Or a shop, your choice)
You'll need a tape measure, 2x4 with a nail in it, 1/2" wrench and a jack.
Takes me 10 minutes.

https://www.jeepforum.com/forum/f12/...gnment-994928/

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post #10 of 10 Old 09-10-2019, 05:02 PM
JJ93YJ
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Check the bushings on the top and bottoms of your shocks. I had the same problem, the right front shock lower bushing was almost all gone. Never made a sound but let the front get shakey at about 60 indicated(speedo reads slow). Was nothing left but one little piece of rubber.
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