Death Wobble Rookie - First Instance Need Help Diagnosing Root Cause
#11
JK Jedi
UPDATE: I dropped the track bar tonight and confirmed it is toast. The bushing connecting to the drivers side flops around both vertically and horizontally with ease and the back is partially wallowed out.
The axle side also has about 1/8" play in the bushing laterally and once again the back is partially wallowed out and the bolt appears to be very slightly bent. Thread marks are also Cleary visible in the bushings.
Ordered a new track bar since no one near me has a throw away from a lift. I'm also upgrading the bolts to 9/16-18 x 3.0 (grade 8) with washers and nylon nuts. Think that should suffice?
Would a skyjacker track bar be an ok replacement? It is adjustable but will be set to 0 lift.
The axle side also has about 1/8" play in the bushing laterally and once again the back is partially wallowed out and the bolt appears to be very slightly bent. Thread marks are also Cleary visible in the bushings.
Ordered a new track bar since no one near me has a throw away from a lift. I'm also upgrading the bolts to 9/16-18 x 3.0 (grade 8) with washers and nylon nuts. Think that should suffice?
Would a skyjacker track bar be an ok replacement? It is adjustable but will be set to 0 lift.
#12
JK Newbie
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The brackets on both the drivers and axle side look to be ok with very little to no wallowing.
Since I'm putting new hardware in I'm going to use a washer as well as a little extra reinforcement as it looks like the stock bolt head made a nice impression into the metal.
Last question: should the track bar be able to fall out of the bracket with ease when removing the bolts? Removed them on the ground and it just flopped right out when the bolts were removed
Since I'm putting new hardware in I'm going to use a washer as well as a little extra reinforcement as it looks like the stock bolt head made a nice impression into the metal.
Last question: should the track bar be able to fall out of the bracket with ease when removing the bolts? Removed them on the ground and it just flopped right out when the bolts were removed
#13
JK Jedi
The brackets on both the drivers and axle side look to be ok with very little to no wallowing.
Since I'm putting new hardware in I'm going to use a washer as well as a little extra reinforcement as it looks like the stock bolt head made a nice impression into the metal.
Last question: should the track bar be able to fall out of the bracket with ease when removing the bolts? Removed them on the ground and it just flopped right out when the bolts were removed
Since I'm putting new hardware in I'm going to use a washer as well as a little extra reinforcement as it looks like the stock bolt head made a nice impression into the metal.
Last question: should the track bar be able to fall out of the bracket with ease when removing the bolts? Removed them on the ground and it just flopped right out when the bolts were removed
If possible, it would really help to weld those washers (even if just a few solid tacks) to the bracket to help reinforce the hole.
#14
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UPDATE: The track bar was finally delivered and I will install it tonight along with 9/16" Grade 8 bolts.
I also may have to order 2 Lower Controls Arms as I noticed the bushing was wallowed out from the threaded 14mm Bolts. As of right now I will put 9/16" Grade 8 bolts as well there
I also may have to order 2 Lower Controls Arms as I noticed the bushing was wallowed out from the threaded 14mm Bolts. As of right now I will put 9/16" Grade 8 bolts as well there
#15
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10/27/17 UPDATE:
So last night I installed the Track Bar and torqued to spec. I also removed the bolts from the lower control arm and noticed the following:
The bushings were actually OK. However the torque specs were FUBAR!
Driver Lower Control Arm:
Bolt to Body - 130 ft lbs
Bolt to Axel - >30 ft lbs
Passenger Lower Control Arm:
Bolt to Body - 130 ft lbs
Bolt to Axel - >30 ft lbs
In order to get the passenger lower control arm bolts to line up I needed to push the passenger side of the axle back about 3/4". The passenger side saw wallowing at the body but not on the axle. I may need to have a welder come in and weld the washers to the frame.
I think I may have found all of the problems surrounding the Death Wobble. I installed all Grade 8 9/16" bolts for the controls arms and torqued to 130 ft lbs along with the track bar. Now, the alignment is very off as in pulling hard to the right. In order to drive in a straight line I need to have the wheel turned left to the 10 o'clock position.
Question: When alignments are performed do they need to loosen the lower control arm bolts going to the axle? Or could this just be a case of extreme slop that was finally corrected after putting all the bolts back in?
I took it for a test drive for about 5 miles hitting all manhole covers and bumps I could find at 65-70 mph. Does not feel like there is a wobble anymore or trying to start the wobble. However, it is undrivable until I put new tires on and get an alignment. Furthermore, the handeling seems to have stiffened up SIGNIFICANTLY and I feel I may have to learn how to drive it again!
Note: the 135,000 miles I have on the jeep are pretty much all NYC traffic hitting all potholes and bumps (Cross Bronx Expressway I-95)
I am wondering since there was so much slop that it was actually unable to cause a Death Wobble and after correcting everything with new components, the DW could happen because the tie rods and drag links were trying to correct it.
So last night I installed the Track Bar and torqued to spec. I also removed the bolts from the lower control arm and noticed the following:
The bushings were actually OK. However the torque specs were FUBAR!
Driver Lower Control Arm:
Bolt to Body - 130 ft lbs
Bolt to Axel - >30 ft lbs
Passenger Lower Control Arm:
Bolt to Body - 130 ft lbs
Bolt to Axel - >30 ft lbs
In order to get the passenger lower control arm bolts to line up I needed to push the passenger side of the axle back about 3/4". The passenger side saw wallowing at the body but not on the axle. I may need to have a welder come in and weld the washers to the frame.
I think I may have found all of the problems surrounding the Death Wobble. I installed all Grade 8 9/16" bolts for the controls arms and torqued to 130 ft lbs along with the track bar. Now, the alignment is very off as in pulling hard to the right. In order to drive in a straight line I need to have the wheel turned left to the 10 o'clock position.
Question: When alignments are performed do they need to loosen the lower control arm bolts going to the axle? Or could this just be a case of extreme slop that was finally corrected after putting all the bolts back in?
I took it for a test drive for about 5 miles hitting all manhole covers and bumps I could find at 65-70 mph. Does not feel like there is a wobble anymore or trying to start the wobble. However, it is undrivable until I put new tires on and get an alignment. Furthermore, the handeling seems to have stiffened up SIGNIFICANTLY and I feel I may have to learn how to drive it again!
Note: the 135,000 miles I have on the jeep are pretty much all NYC traffic hitting all potholes and bumps (Cross Bronx Expressway I-95)
I am wondering since there was so much slop that it was actually unable to cause a Death Wobble and after correcting everything with new components, the DW could happen because the tie rods and drag links were trying to correct it.
Last edited by varack; 10-27-2017 at 11:23 AM.
#16
Super Moderator
Glad you solved your problem!
#17
JK Jedi
I'd grab an alignment to make sure your toe is correct, and get a reading on your caster. The length of that passenger side arm didn't change at all, so it's likely you had to line the bolt back up just cuz the axle moved a bit when you removed it (ie. the axle is right where it was before still).
All-in-all, it sounds like you finally nailed down the problem. Hopefully you'll be problem free for another 135k miles!