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  #1  
Old January 14th, 2018, 14:39
Luigi1285 Luigi1285 is offline
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More death wobble

So i picked up a 2001 cherokee sport a few weeks back. It has a 4.5 rough country x lift. The front end was noisey, a little loose, and had some wheel vibration... so i replaced the following this weekend

-upper control arm x joint with johnny joints
-new lower control arm bushings
-new upper control arm bushing
-new rubicon express track bar
-new rubicon express track bar bracket
-new rubicon express track bar brace
-new crown automotice hd steering set up

The truck didnt have death wobble before just noisy and loose. Now its quiet and tight until i hit 40 then all hell breaks loose. Im at a loss. Went over all the bolts everything is tight. No play on anything. Any help would be appreciated


every thing is tight no
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  #2  
Old January 14th, 2018, 17:17
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IslanderOffRoad IslanderOffRoad is offline
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Re: More death wobble

Check:

Tire balance
Unit bearings
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  #3  
Old January 14th, 2018, 19:15
tech1001 tech1001 is offline
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Re: More death wobble

Also whats the caster set at , and does it have adjustable upper and lower control arms
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  #4  
Old January 14th, 2018, 19:47
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jeep ride jeep ride is offline
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Re: More death wobble

Alignment issues did you set toe in ?
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  #5  
Old January 15th, 2018, 05:28
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jdougn jdougn is offline
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Re: More death wobble

Lots of good suggestions here. Alignment is high on the list of possibilities. Might also check other wear points like tie rod ends, hubs, and the steering box spacer that is between the "frame" and the steering box to see if it's intact.
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  #6  
Old January 15th, 2018, 07:14
Luigi1285 Luigi1285 is offline
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Re: More death wobble

tie rod ends are all new. Also to add i removed the rc double steering stabilizer. when the wobble happened there was no stabilizer. i know its not a cure all but i ordered a new one.

what is the best way to check caster? i have been searching and cant find the answer....
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Old January 15th, 2018, 08:24
RCP Phx RCP Phx is offline
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Re: More death wobble

I would be "leary" of any Crown steering parts!
You can p/u a angle finder at your local hardware store for less than 10$.
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  #8  
Old January 15th, 2018, 09:28
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Greenz Greenz is offline
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Re: More death wobble

Quote:
Originally Posted by Luigi1285 View Post
what is the best way to check caster? i have been searching and cant find the answer....
Angle finder on the machined flat surface of the axle "C". This is where the ball joints are mounted.

Don't forget to account for the grade you are parked on. Most driveways and garages have a slope for drainage.
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  #9  
Old January 15th, 2018, 11:47
Luigi1285 Luigi1285 is offline
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More death wobble

Gotcha gonna grab one and check later. Iím hoping thatís all it is because it drove so nice until 40 lol


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  #10  
Old January 15th, 2018, 18:28
Green XJ Jeep Green XJ Jeep is offline
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Re: More death wobble

Ball joints?
You haven't mentioned them
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  #11  
Old January 16th, 2018, 06:34
Luigi1285 Luigi1285 is offline
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More death wobble

Ball joints seem tight no play. Iím thinking caster hopefully after work I get a few minutes to check. Iíll keep you guys posted


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  #12  
Old January 16th, 2018, 09:39
burntkat burntkat is offline
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Re: More death wobble

Quote:
Originally Posted by Luigi1285 View Post
tie rod ends are all new. Also to add i removed the rc double steering stabilizer. when the wobble happened there was no stabilizer. i know its not a cure all but i ordered a new one.

what is the best way to check caster? i have been searching and cant find the answer....
Just because the joints are new doesn't mean they are right. ESPECIALLY if it says "Crown" on the box.

I'd stick with Moog joints, personally. I am fighting this same fight at present, myself. Brand new parts house joints already have a little play in them, and I greased them well last month when I installed. Wife's 94 ZJ has the same problem but much worse- I used the same joints on it last year. You can get Moog for the same or near same price as parts-house parts if you shop on the Internet. Amazon Prime is super handy here.

Use an angle finder on the flat bottom of the steering knuckle, with the vehicle on a flat surface.
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-90 XJ 4.0, AW4, 231J: Clayton's longarms, RE 5.5" coils, hybrid 6" leaf pack, 33/12.50/15" MTs, Rancho 99012s and 99624s, Tera HD SYE, custom sliders, BW flares. Rehabbing with D44s, RE spring packs, RE 4.5" coils, and ACOS.
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  #13  
Old January 16th, 2018, 09:44
burntkat burntkat is offline
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Re: More death wobble

FYI- you want caster to be around 6 degrees positive (top of knuckle inclines back toward the driver)

Check the toe as well. 1/8-1/16" of toe-in (front closer together than back). Best to do with the axle on stands so the wheels are off the ground. Color a block on each front tire with a crayon and use those as your measuring points so you ensure you are getting a good read.

Camber should be fine. It's not trivial to adjust anyway- involves special balljoints.

What is the "upper control arm x joint"??

Get under the vehicle with the wheels on a hard concrete surface. Have someone turn the key to Run, without starting the engine. Grab the steering wheel at 10 and 2 and shake it energetically back and forth, and slowly back and forth. You need to look at *EVERYTHING* that moves to see if it's loose or making noise.

My money is on your new joints not being as tight as you'd expect.
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-89 S-10: SAS, D44s front/rear. 5.7L V8. 700R4 with 4L60E upgrades. Built in my driveway.
-90 XJ 4.0, AW4, 231J: Clayton's longarms, RE 5.5" coils, hybrid 6" leaf pack, 33/12.50/15" MTs, Rancho 99012s and 99624s, Tera HD SYE, custom sliders, BW flares. Rehabbing with D44s, RE spring packs, RE 4.5" coils, and ACOS.
-94 ZJ: Budget boost, 31s. The wife's DD.
-97 XJ: Son's DD. 4" lift, ACOS, 4" spring pack, Upcountry coils, 31s
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  #14  
Old January 18th, 2018, 11:39
dano626 dano626 is offline
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Re: More death wobble

I did pretty much the same things as you did, replaced the whole front end. It needed it anyway but still had death wobble..... In the end I had to get my tires balanced and get an alignment..PROBLEM SOLVED. I would suggest getting your tires balanced before anything else.
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  #15  
Old January 18th, 2018, 16:39
Luigi1285 Luigi1285 is offline
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More death wobble

Gonna try to get this done this weekend weather has been shit latley


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