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Old 02-19-2009, 03:13 PM   #1
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Cool Severe Death Wobble

What's going on guys? It's been awhile. My jeeps been down for a couple months now and i kinda drifted away from the forums.

Well i finally got some extra time to fix the problem that i've been having. It's severe death wobble like my tires are about to rip the lugs out. My track bar bolt broke not to long ago and it kinda sheared the sleeve closed. So i just pressed a bolt through it and didn't have any real problems after that. Then one night heading out with some friends and my steering stabilizer bolt came undone. Once that happened that's when i felt the bad death wobble. Replaced the bolt. And now i can't seem to drive over 35 mph w/o it beggining. Once the d/w starts i have to slow down to about 5 mph. I checked the trackbar it seems tight (can't move it any). About to rotate the tires see if that helps any.

Any suggestions would be great. I wanna start driving the Jeep again soon.

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Old 02-19-2009, 03:44 PM   #2
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trackbar bushing and bolt at the axle end. you can replace the bushing for about $5. daystar makes them... they are the same that are used in the stock control arms.

replace the bolt and nut and washer with grade 8 7/16" hardware. You will need to drill out the sleeve a little in order to put the bolt thru it. put it in a vice while you drill the sleeve. you still have the sleeve right?... if not then that is the source of the wobble.

and you cant test the bushing or trackbar by wiggling it with your hands. that wont tell you its tight. the jeep weighs 4k lbs so it will wiggle on the road even if you cant budge it with your hands.

anyway, tighten that grade 8 stuff reallllly good.

then get it aligned cuz the toe in is probably off too.

Also, do you have a lift? if your lifted more than a few inches and have nonadjustable arms then your caster may be off and youd need to lengthen the lower arms to fix that.

hope that helps.

Ben

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Old 02-19-2009, 03:54 PM   #3
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There is about 4-5 inches of lift. I have adj trackbar and tie rod.

The sleeve that was in the bushing is what got pinched at one end. I took a bolt and forced it through the sleeve with a C-clamp. Replaced all the bolts with grade 8 stuff.

I've had a lift since i owned the jeep and i didn't have this problem like i said it started after the steering stabilizer came loose.
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Old 02-19-2009, 04:35 PM   #4
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Ygohome's comments were all right on. Beyond that, the fact it started after the steering stablizer came loose really has nothing to do with the steering stabilizer. A bad steering stabilizer will not cause DW any more than a band-aid causes skin cancer... both just mask the ugly symptom.

I'd make sure the trackbar mounts are both TIGHT by checking them with a wrench. Using a heavier Grade 5 or Grade 8 (or metric Grade 8.8 or 10.9) mounting bolt, especially at the axle end, is a good idea. With a hardened bolt, you can tighten it down more than you can with the factory bolt that can only be tightened to 45-55 ft-lbs. I just installed new 1/2" Grade 8 bolts at both ends of my trackbar and tightened them down with my impact wrench.

Finally, get your tires perfectly (!) balanced. Imperfectly balanced tires are a leading trigger for DW which is then allowed to fully develop by something else being worn or looser than it should be. Many tire shops won't spend the time to get tires truly perfectly balanced as is needed for tires as big as we run on our Jeeps. Some tire shops think that "good enough" balancing is good enough which isn't the case where a lifted Jeep and Death Wobble is concerned.
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Old 03-17-2009, 09:48 AM   #5
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Exclamation My DW fix!

My 2005 Wrangler got DW after adding 2 inch coil spring spacers. By lowering the axles, I inadvertantly decreased the CASTER in my front end. Feel free to contact me at "bb62471(at)yahoo(dot)com". I fixed my DW for $10.00.
Bob.
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Old 03-17-2009, 01:15 PM   #6
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The very (!) slight loss of Caster angle which does happen with any suspension lift after installing only a 2" spacer kit will not cause DW. Just about everyone with a suspension lift is running less than the factory specified 6-8 degrees of Caster angle and without DW... me included.

DW is caused by a lot of things... out of balance tires, loose trackbar mounting bolt, wallowed-out trackbar mounting bolt hole, bad bushings, loose shocks, loose trackbars, bad toe-in setting, etc. but not from the slight loss of Caster angle from merely installing a 2" budget boost.
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Old 03-17-2009, 02:31 PM   #7
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You have something loose somewhere or the tires are the culprit, I agree that caster will not cause the DW. Someone I know set their caster to 0* and had no DW, mine is at 5* so that my pinion angle will be correct and I have no DW.
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Old 03-17-2009, 09:01 PM   #8
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Also check all your bushings in your LCA- UCA.
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Old 03-20-2009, 04:22 PM   #9
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Sorry... I meant by adding those coil spring spacers, I added CASTER from +7 (spec) to +10 degrees. This made my wheel wobble like a shopping cart after hitting the slightest bump at 40MPH+. I was able to lower the CASTER to 7-8 degrees with the offset washers I made, and then re-set the toe to 1/8" in.
Anyhow, believe what you want, by my correcting my steering/suspension geometry, my wobble went away for good. I have about 1000 miles on it since I fixed it.
If anyone has questions, dont be afraid to ask. Or you can just bash my opinion.
bb62471(at)yahoo(dot)com
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Old 04-05-2009, 02:31 PM   #10
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Arrow 2500 miles since last wobble...

Still no DW. Not that my fix is for everyone, but it sure fixed mine.

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