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Old 07-28-2016, 02:30 PM   #1 (permalink)
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*FIXED* 81 Ford Kingpin 60 3-linked YJ help *FIXED*

Over the winter I put in a kingpin 60 and rear 14 bolt. Upon doing this I also 3-linked the front and am running King 14" 2.5 coilovers.

Under acceleration the Jeep pulls hard Left/Right and when I let off it pulls Left/Right. Very hard to drive and to keep straight.

What could cause this? Caster? Not sure where I need to be for driving on the streets.

Tires are 39.5" Iroks on H1s

I did have the panhard and draglink parallel and same length untill steering was binding. To fix this I had to move the draglink attachment point on the pitman arm. This now makes the panhard and draglink no longer parallel. Could this be the cause? Its not way out of wack....

Thanks for the help!

Last edited by MoparyYJ360; 08-02-2016 at 03:01 PM.
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Old 07-28-2016, 02:55 PM   #2 (permalink)
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pics of front suspension from both sides/ front?
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Old 07-28-2016, 03:38 PM   #3 (permalink)
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Old 07-28-2016, 04:56 PM   #4 (permalink)
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Does the nose come up under acceleration? And have you checked to make sure your front axles toed in and what's your camber at?

I have seen worse angles that drove fine. In fact mines worse.
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Old 07-28-2016, 05:03 PM   #5 (permalink)
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the nose does come up under acceleration. I did check the toe and its around 1/8" towed IN. Camber...not sure what it was set to before I changed it to 0*...have yet to drive it like this. I have had it from 3-5 and didn't seem to make a difference.

Coils are aired up to ~150psi
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Old 07-29-2016, 06:00 AM   #6 (permalink)
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Don't rule out the rear. Just check all the link mounts and track bar if you have it. If any of that is broken or very lose you can get rear axle movement under power that will cause directional issues.
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Old 07-29-2016, 06:16 AM   #7 (permalink)
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Rear is still leaf sprung new re 1.5 soa springs and bushings. Did this before the new rear springs though. Snapped a main leaf while at silver lake sand dunes
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Old 07-31-2016, 07:38 AM   #8 (permalink)
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your track bar and drag link aren't exactly the correct geometry either. That doesn't help.
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Old 07-31-2016, 07:50 AM   #9 (permalink)
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Even when they were, it still did the same. That's why you can see the washers stacked. Steering would bind at full droop
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Old 07-31-2016, 08:45 AM   #10 (permalink)
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Quote:
Originally Posted by MoparyYJ360 View Post
the nose does come up under acceleration. I did check the toe and its around 1/8" towed IN. Camber...not sure what it was set to before I changed it to 0*...have yet to drive it like this. I have had it from 3-5 and didn't seem to make a difference.

Coils are aired up to ~150psi
I'm sure you mean caster and not camber. Look up stock specs for the axle you're running. Im running a little more caster than stock for my axle. About 8. Have you ran the numbers on your links? Your lowers look really short. Stacking washers under draglink cant be good. Have you had someone turn the wheel back and forth while youre looking at everything? Are you sure all bolts are tight. My truck did that when one of my lowers links was loose at the frame. I would go to a drop pitman and lower the frame side panhard mount.
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Old 07-31-2016, 09:58 AM   #11 (permalink)
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Correct I meant caster. I did not run my numbers. They are longer than a friend's and his drives just fine. I did the washer stack as when the heims was flush on hi steer arm, it would bind at full droop. So I did this as a quick fix to go wheeling. I plan to double sheer it when it's all set. I have seen people run spacers?

Have not had someone turn the wheel...good Ida lol.

I'm re doing the frame and axle side panhard mounts now to make them the same angle as drag.
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Old 07-31-2016, 10:49 AM   #12 (permalink)
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Need to see more pics. Upper link. link angles. What are your spring rates? Valving?
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Old 07-31-2016, 11:19 AM   #13 (permalink)
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Let me finish the new panhard mounts, and I will get that info hopefully later today
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Old 08-02-2016, 03:01 PM   #14 (permalink)
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Sorry for the delay!

So...its fixed. Angles of panhard and drag link were the cause. They are now parallel and no more pull. Drives great even at 0* caster
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