Lifted JK front steering component Geometry
#1
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Lifted JK front steering component Geometry
Ok, after 2 bad Death wobble instances, I have started the elimination process on components to correct it. Let me first say , that I have a 3.5" lift running 35" tires. First my steering stabilizer was attached to the same bolt location as my axle end track bar. Ridiculous angle from the tie rod to the axle , causing an inefficient effect I'm sure. So I moved that to the lower hole and greatly paralleled the shock and tie rod. Next , due to a fair amount of flex(1/8-1/4") from what appeared to be the OEM track bar, I now have installed the Teraflex adj monster track bar. I used stock mounting holes so the angle is just what it is. Now I had a guy at a local jeep shop tell me I already had an after market flip kit drag link. Me being a newbie to all of this frontend steering componentry took him at his word.
Can someone on here tell me based on the photos, if indeed I have a flip kit...I don't think so, now after doing some research....it attaches from the bottom!.
It seems to me that If my drag link was attached on the top side of my knuckle, then the steer angle would be less and actually more in line with my track bar angle which I think I understand is the geometry you strive for to make for better steering , better control ands less stress on the pitman arm , etc.
Also , can the ball joint in my drag link be removed and flipped so I can place it on top of the knuckle or is this an all together incorrect drag link.( ie ball joints are built into drag links from factory.
Thanks in advance for all the education and advice anyone can give.
Marc
Can someone on here tell me based on the photos, if indeed I have a flip kit...I don't think so, now after doing some research....it attaches from the bottom!.
It seems to me that If my drag link was attached on the top side of my knuckle, then the steer angle would be less and actually more in line with my track bar angle which I think I understand is the geometry you strive for to make for better steering , better control ands less stress on the pitman arm , etc.
Also , can the ball joint in my drag link be removed and flipped so I can place it on top of the knuckle or is this an all together incorrect drag link.( ie ball joints are built into drag links from factory.
Thanks in advance for all the education and advice anyone can give.
Marc
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Can someone on here tell me based on the photos, if indeed I have a flip kit...
It seems to me that If my drag link was attached on the top side of my knuckle, then the steer angle would be less and actually more in line with my track bar angle which I think I understand is the geometry you strive for to make for better steering , better control ands less stress on the pitman arm , etc.
I don't remember the members name who owns this rig, but it's a good example to show the kind of pic you want to take. Notice the Raised Trackbar Bracket AND the Draglink mounted on top of the knuckle, and the red lines connecting the boltholes shows a clear representation of how parallel they are after the flip..
Last edited by nthinuf; 11-09-2019 at 04:22 PM.
#4
I have had a bunch of steering stabilizers... they get hit with rocks and break out in Southern Utah. But have never seen one angled back like that off the tire rod. All mine run right on top of the tie rod when tires were straight... exactly like the Falcon pic above. ^^
9 out of 10 times it's the trackbar in my experience. Even the slightest play and it's game over. Even with the new bolt on passenger side of pics, if that bushing inside the trackbar is not perfect, it will create wobble..
If you are getting death wobble (usually around 40 mph or so for me) and it's a smooth road... very consistent, every time you reach 40, death grip on steering wheel, then totally with you. If instead, you feel like you are getting wobble when you go over a pothole, I bet it's ball joints. If you feel like a bobble head driving down the road, would check hubs and bearings.
It wouldn't hurt to lift each side of Jeep and see if you have play in the wheels that should not be there. But I would start with replacing the inner pieces on both side of trackbar (all the manufacturers sell them) and torque to exact specs. Good luck!!
9 out of 10 times it's the trackbar in my experience. Even the slightest play and it's game over. Even with the new bolt on passenger side of pics, if that bushing inside the trackbar is not perfect, it will create wobble..
If you are getting death wobble (usually around 40 mph or so for me) and it's a smooth road... very consistent, every time you reach 40, death grip on steering wheel, then totally with you. If instead, you feel like you are getting wobble when you go over a pothole, I bet it's ball joints. If you feel like a bobble head driving down the road, would check hubs and bearings.
It wouldn't hurt to lift each side of Jeep and see if you have play in the wheels that should not be there. But I would start with replacing the inner pieces on both side of trackbar (all the manufacturers sell them) and torque to exact specs. Good luck!!
#5
JK Enthusiast
One thing that I did not see addressed is just flipping the draglink. The knuckle on the draglink end is tapered, so it is smaller at the top than at the bottom. It does look like and aftermarket draglink. You might be able to find a flip end, which could either require drilling out the knuckle, or SteerSmarts uses a bushing to make the hole a consistent diameter so that you can top mount the drag link.
#6
JK Jedi
You cannot flip that DL in the picture due to the bend. You'll need a new DL or at least a new Knuckle end. The Yeit 26 knuckle end from SteerSmarts might be a good option for you since you have the raised bracket already. Also, it's a no-drill so install is as simple as remove the old end and screw the new end into the existing turnbuckle, then mount on the knuckle.
#7
JK Jedi
I can not tell from your photos but are you running a drop pitman arm with that kit? If you can't tell post up a photo of it and we can verify. You don't want to run a drag link flip with a drop pitman arm.
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#8
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yes , I definitely notice a more controlled , smooth feel to the steering and ride after installing the teraflex monster track bar.( drove over old pothole areas that use to set it off and nothing happened) I think if I get a flip kit drag link end and install that, I will have the best I can hope for in front end steering geometry for a 3.5" lifted jeep.
#10
JK Jedi
I just noticed you have no front bump stops. You will need to run 3" bump when doing a DL flip otherwise you'll be jamming your DL into the frame rail as the passenger side is stuffed.