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  #31  
Old December 13th, 2017, 21:04
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Anak Anak is offline
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Re: Yet another death wobble help request

Quote:
Originally Posted by blakews2217 View Post
Also, the tire shop I had mount and balance my tires said that the tires didnít balance too well.
This might be worth revisiting.

Do you have a buddy with another XJ whose tires/wheels you could swap for long enough for a test drive? Ideally a set of tires/wheels that are known to be well balanced.
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  #32  
Old December 14th, 2017, 10:14
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techno1154 techno1154 is offline
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Re: Yet another death wobble help request

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Originally Posted by Boostwerks.com View Post
One thing that doesn't come up very often in DW threads is motor mounts. While bad motor mounts themselves don't necessarily cause DW, they can make a small shake a lot worse. The motor is after all the majority of the mass being tossed back and forth.

This video does a great job of showing this. Notice the opposite motion of the engine and axle...

https://www.youtube.com/watch?v=07yvJuhnUYM

That video is quite humorous! Thanks for sharing that.

I too had death wobble at nearly 300,000 miles. It start at about 50 MPH and end at 30 MPH. I stayed off the highway for several months because of that.
The fix?
I replaced everything on the front that moved except the shocks and the steering damper which were relatively new.

All steering knuckles;
All ball joints;
All hubs and associated bearings;
All control arm bushings;
Panhard Rod bushings;
Balanced all wheels and tires combination;
Tightened all fasteners to specs.

Did I miss something?

While I was there, I made custom steering linkages because of the extra weight exerted by Jeep WK brakes and JK OEM wheels. Did a drive way alignment which I think is maybe 90%+ accurate. I was then able to drive in excess of 85 MPH with no steering damper attached whit the XJ remaining as steady as the average family sedan.

I have since re-installed the steering damper (needed a clamp to fit the drag link),... peace of mind and legal liability issues.

A person do not have to do what I did, change everything. However, every part, every item that you have to question whether or not it is good should be replaced. Your well being and that of everyone else in the same area of town as you are depends on those questionable parts.
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1996 XJ; 4.0L; AW4; NP231; SYE; D30 and D44; ECTED; 4.10 gears; 30X9.5 -15 BFG/AT/KO; 3" lift; Rusty's LCA; JKS ADJ UCA; Kevins ADJ Track bar; Drawtite Front Receiver; Dual Electric Fans; Dual Battaries.

Last edited by techno1154; December 14th, 2017 at 10:18.
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  #33  
Old December 14th, 2017, 10:20
RCP Phx RCP Phx is offline
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Re: Yet another death wobble help request

That is funny! Where's the trackbar?
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  #34  
Old December 14th, 2017, 14:48
burntkat burntkat is offline
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Re: Yet another death wobble help request

He said "Panhard Rod". Same exact thing.
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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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  #35  
Old December 14th, 2017, 17:16
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techno1154 techno1154 is offline
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Re: Yet another death wobble help request

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Originally Posted by burntkat View Post
He said "Panhard Rod". Same exact thing.
Yep,....same thing.
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1996 XJ; 4.0L; AW4; NP231; SYE; D30 and D44; ECTED; 4.10 gears; 30X9.5 -15 BFG/AT/KO; 3" lift; Rusty's LCA; JKS ADJ UCA; Kevins ADJ Track bar; Drawtite Front Receiver; Dual Electric Fans; Dual Battaries.
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  #36  
Old December 14th, 2017, 19:53
blakews2217 blakews2217 is offline
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Yet another death wobble help request

Quote:
Originally Posted by Anak View Post
This might be worth revisiting.

Do you have a buddy with another XJ whose tires/wheels you could swap for long enough for a test drive? Ideally a set of tires/wheels that are known to be well balanced.


The jeep has sadly taken the back burner as the motor has $h!t the bed. Had a lifter fail. Not a big deal but seeing as itís lived 9 months with very low oil pressure ( 10 psi ) itís due for a rebuild again. So now my project truck takes the lead as it needs less work to be reliable.

As far as the jeep goes, I have no good balanced tires to test with. Hell the jeep drove fine with 33x12.50 boggers on it, well maybe a little wobble but not so bad as to be death wobble. Those 15 year old tires have failed though. Thanks everyone who participated in helping. So far I havenít changed the hub assemblyís, upper/lower ball joints, the control arms themselves, the steering box spacer, ( although when I swapped the box to a known good one it looked fine. So Iíll call it inspected) and steering dampener. Also I am running some 1.5Ē wheel spacers if that brings anything into this


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  #37  
Old December 17th, 2017, 15:02
burntkat burntkat is offline
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Re: Yet another death wobble help request

Something I just ran across on the kid's 97, I can't verify it's fixed it but it assuredly has been contributing...
-axle shaft ujoints, or damage to the yoke ears. The passenger side on his jeep has tons of slop, and the I error shaft has a cap that is either glued or welded on - poorly. This caused the shaft to oscillate back and forth in the axle tube, just with manual movement. I can see this being a source of intermittent wobble.
-hub bearing. Probably related to the above, the hub bearing is notch on this side. I can also see this relating to the issue.
I haven't done the driver side yet, and the vehicle is deadlined as I sheered two of three hub bolts trying to get it off. New hardware arrives Tuesday, I'm hoping for a shakedown ride by Wednesday evening.
__________________
-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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  #38  
Old December 23rd, 2017, 06:39
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TDoggs TDoggs is offline
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Re: Yet another death wobble help request

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Originally Posted by Green XJ Jeep View Post
I have had worn brake pad sliders on the knuckle causing the pads to hang up causing death wobble.
A sticky caliper will as well.
Lots of potential causes you just need to keep picking away at it
WOW. I'm having wobble issues as well and before it started, I changed the rotors and pads on the front.

How is a sticky caliper and sliders diagnosed?
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  #39  
Old December 23rd, 2017, 06:46
BenWheelin BenWheelin is offline
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Re: Yet another death wobble help request

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Originally Posted by TDoggs View Post
WOW. I'm having wobble issues as well and before it started, I changed the rotors and pads on the front.

How is a sticky caliper and sliders diagnosed?
Bright red, glowing rotor behind the wheel, smoke, odor, etc. If the paint is cooked off of the pad's backsides, the caliper is sticking.
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  #40  
Old December 23rd, 2017, 16:41
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Re: Yet another death wobble help request

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Originally Posted by BenWheelin View Post
Bright red, glowing rotor behind the wheel, smoke, odor, etc. If the paint is cooked off of the pad's backsides, the caliper is sticking.
Thanks. I'll be giving them a good check after church tomorrow.
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