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Old 12-19-2012, 09:25 AM   #31
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Me.

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Old 12-19-2012, 09:27 AM   #32
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Me.
Any luck getting the DW taken care of?

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Old 12-19-2012, 09:33 AM   #33
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Any luck getting the DW taken care of?
I may try and look at it today. I don't have a lot of time with work and this morning I woke up feeling like road kill. If I leave work early I'm going to go home and try and look at it later.
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Old 12-19-2012, 10:00 AM   #34
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I want to add in response to the comments saying that your Jeep is too new for this or that to be the problem. The fact is that you experienced death wobble twice at 70mph, and that in itself can cause enough damage to any of the possible culprits to where you may now have multiple problem areas. Anything is fair game at this point IMO. Go through the check list and check everything.

Bad alignment, bad caster, unbalanced tires, tire pressure, etc. would not be the cause for death wobble, but you do want to get those dialed in correctly, not only for better handling but also to reduce wear on components that WILL cause death wobble.

A new, beefier steering stabilizer will only mask the problem, but it may help reduce the intensity of future occurrences of death wobble and reduce further damage. When I had death wobble, I only experienced the full violent shaking when I removed my steering stabilizer. With the steering stabilizer on, it was manifested as only a small shimmy.

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Old 12-20-2012, 06:13 PM   #35
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My pinion is at 91.5-92 degrees meaning my caster is at 4.5-5 degrees. Visual inspection showed one possible culprit; there may be wear around the lower track bar bolt. I won't be able to take things apart until tomorrow or Sunday, so ill be able to visually inspect it then. I'm going to replace all the bolts with the correct sized ones and I lowered tire pressure from 35 to 33.
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Old 12-20-2012, 06:14 PM   #36
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And my axle appears to be dead on measuring from tires to spring perches.
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Old 12-20-2012, 06:25 PM   #37
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Quote:
Originally Posted by Six View Post
My pinion is at 91.5-92 degrees meaning my caster is at 4.5-5 degrees. Visual inspection showed one possible culprit; there may be wear around the lower track bar bolt. I won't be able to take things apart until tomorrow or Sunday, so ill be able to visually inspect it then. I'm going to replace all the bolts with the correct sized ones and I lowered tire pressure from 35 to 33.
Track bar bolts and where they go through the bracket seem to be the most common causes
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Old 12-20-2012, 06:38 PM   #38
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Hold up. Where did you measure pinion? Would 92* = 8* caster. Pinion pointing down 4* from stock ?

0 = 6
+2 = 4 (stock)
-2 = 8

Or has my day been too long lol
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Old 01-11-2013, 05:41 PM   #39
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I took my RK track bar out and wanted to make sure it's adjusted right. I was attempting to unscrew the jam nut on the frame side and the entire bar is spinning. WTF?

I'm thinking this could definitely be the culprit here. Unfortunately RK is closed until Monday...

Can I drive it out of my garage and into my driveway do I can get my bike in and out of the garage without the track bar on it? Or should I put it back on.

It's not supposed to spin like that, is it?
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Old 01-11-2013, 05:52 PM   #40
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Quote:
Originally Posted by Six
I took my RK track bar out and wanted to make sure it's adjusted right. I was attempting to unscrew the jam nut on the frame side and the entire bar is spinning. WTF?

I'm thinking this could definitely be the culprit here. Unfortunately RK is closed until Monday...

Can I drive it out of my garage and into my driveway do I can get my bike in and out of the garage without the track bar on it? Or should I put it back on.

It's not supposed to spin like that, is it?
Yes you can drive slow.

Are the threads stripped ? What is spinning ?
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Old 01-11-2013, 06:48 PM   #41
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Yes you can drive slow.

Are the threads stripped ? What is spinning ?


I guess the jam nuts weren't tight enough. The lower track bar hole is ovaled. I'm going to see if the local shop can help fix that bracket and get everything squared away. The other shop I went to must not have tightened everything. The 9/16 bolts have play in the lower track bar bracket. I don't have the tools to tighten everything. Even with the bar in a bench vise on a bench covered in tools I'm still pulling the bench instead of torquing the bar. I know it's not at 200 ft/lbs.
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Old 01-11-2013, 07:03 PM   #42
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Synergy track bar bracket. Synergy makes some awesome stuff as well. I just ordered their chromo tie rod as well.
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Old 01-11-2013, 07:21 PM   #43
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I have a 2.5" lift. The bracket says for 3" and up. That's an issue?
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Old 01-11-2013, 07:31 PM   #44
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Have the shop weld a heavy washer on each side of the bracket to fix the ovaled out holes. Nothing to stop you from using Loc-Tite on the jam nuts.
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Old 01-11-2013, 07:36 PM   #45
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Quote:
Originally Posted by SilverSport
Have the shop weld a heavy washer on each side of the bracket to fix the ovaled out holes. Nothing to stop you from using Loc-Tite on the jam nuts.
Yep

I know they make replacement HD brackets that keep the Tb in the stock location.
Mine is used with a drag link flip. track bar and drag link get raised 3"

The washers will work well for a easy fix.
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Old 01-11-2013, 10:40 PM   #46
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Quote:
Originally Posted by Six



I guess the jam nuts weren't tight enough. The lower track bar hole is ovaled. I'm going to see if the local shop can help fix that bracket and get everything squared away. The other shop I went to must not have tightened everything. The 9/16 bolts have play in the lower track bar bracket. I don't have the tools to tighten everything. Even with the bar in a bench vise on a bench covered in tools I'm still pulling the bench instead of torquing the bar. I know it's not at 200 ft/lbs.
Yep. Jam nuts not tight enough and it stretches, or even strips, the threads in the tube. That would give you problems and contributed to the ovaling of the bracket holes.

The good news is that you've found the initial problems. You still want to inspect the rest of the components to see if anything else has been damaged.
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Old 01-12-2013, 06:27 AM   #47
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I had a similar experience. I checked everything on Planman's list, but everything seemed fine. Finally I was looking at my tires and noticed the spot where a balance weight used to be. Had that tire rebalanced and no more wobble when I hit bumps at high speed.
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Old 01-12-2013, 11:07 AM   #48
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This isn't a small wobble. It's full on DW. I have to slow down to 5-10 mph on the interstate for it to stop.
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Old 01-12-2013, 11:54 AM   #49
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Have you checked/replaced TRE's and balljoints ?

We all know the TB is usually the source of DW. But what else could be contributing to it?

I bet you have other things going on.
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Old 01-12-2013, 01:23 PM   #50
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Quote:
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Have you checked/replaced TRE's and balljoints ?

We all know the TB is usually the source of DW. But what else could be contributing to it?

I bet you have other things going on.
^This.

Six - maybe you mentioned it already, but did you do the full inspection that planman has in the DW thread?
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Old 01-14-2013, 01:16 PM   #51
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Is my track bar still good or is it shot?

I got wobble again today but the bar looks like it's solid. I'm taking it and the LCAs off to add red lock tite and tighten them as much as I possibly can with what tools I have.

I'm going through planman's thread after that and seeing if anything else need to be replaced.

Someone said something about checking bushings with a screw driver. How do I do that? It looks like the only way to accurately inspect them is to remove the bushings from the end of the track bar and the LCAs.

Edit: Also, while I have the LCAs out, should I adjust them for more caster? They're set almost at the 4.whatever % that Jeep normally recommends. Could this also be a contributing factor?
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Old 01-14-2013, 02:35 PM   #52
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Really silly question here Six, but did you check to see that the jam nuts on the control arms and trackbar were locked on and not loose? Alignment shops will sometimes "forget" to lock them because on the track bar you have to do it while they are off. This will cause some serious issue and destroy your heim joints. I would also check out those joints and make sure that they didn't blow a seal and loose their grease.
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Old 01-14-2013, 02:51 PM   #53
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Really silly question here Six, but did you check to see that the jam nuts on the control arms and trackbar were locked on and not loose? Alignment shops will sometimes "forget" to lock them because on the track bar you have to do it while they are off. This will cause some serious issue and destroy your heim joints. I would also check out those joints and make sure that they didn't blow a seal and loose their grease.
The trackbar was and I tightened the other night. I'm going to get a 9/16" drill bit, red lock tight, and a grease gun tonight. The LCAs appear tight still and haven't moved.

The supension feels like it wants to move horizontally when it hits a bump. Is this normal?
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Old 01-15-2013, 08:32 AM   #54
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If you torque the bolts to 125 ft lbs, Loctite isn't needed or desired.

You just want to retorque after every major wheeling trip and at every oil change interval.

When your torque spec has backed off, more often than not it is because the metal has fatigued, the threads on the bolt have stretched, or the bushing end has compressed. Loctite then messes with your subsequent torque specs.

Running it on wheel lugs with Spidertrax hubcentric wheel spacers at 95 ft lbs is different than running it on a suspension component bolt at 125 ft lbs that gets twisted and absorbs significant lateral vibration.
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Old 01-15-2013, 10:10 AM   #55
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If you torque the bolts to 125 ft lbs, Loctite isn't needed or desired.

You just want to retorque after every major wheeling trip and at every oil change interval.

When your torque spec has backed off, more often than not it is because the metal has fatigued, the threads on the bolt have stretched, or the bushing end has compressed. Loctite then messes with your subsequent torque specs.

Running it on wheel lugs with Spidertrax hubcentric wheel spacers at 95 ft lbs is different than running it on a suspension component bolt at 125 ft lbs that gets twisted and absorbs significant lateral vibration.
Loctite will be going on the track bar jam nuts and LCA jam nuts, not the bolts that go through the brackets and bushing ends.
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Old 01-15-2013, 10:39 AM   #56
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Damn brother. Frustrating, I hope you figure this out.
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Old 01-15-2013, 10:41 AM   #57
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Caster is fine at 4 which is stock,

What is the toe set at ?
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Old 01-15-2013, 11:15 AM   #58
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It was at 1/8th in the last time it was done, but it may be out after my latest adventures. I had to postpone the stuff until tomorrow. I ended up at Home Depot but didn't have my debit card so I'm going tomorrow after work and doing the wrenching then.
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Old 01-15-2013, 12:51 PM   #59
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Quote:
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Loctite will be going on the track bar jam nuts and LCA jam nuts, not the bolts that go through the brackets and bushing ends.
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Old 01-17-2013, 10:12 AM   #60
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Any news on this bro?

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