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Old 03-31-2018, 07:08 PM
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RK 3.5” lift and pulls

Hey guys,
Just completed my wife’s build, RK 3.5” lift x-factor with drag link and my wife just told me that the Jeep is pulling left when she accelerates away from stop lights. So I went out for a quick drive tonight and it feels like someone is lifting the rear end and pushing you left while accelerating from the stop light. It’s only been out of shop for three days so we haven’t driven it much yet but I had them place torque paint on all of the bolts so I could visualize any loosening of bolts and they all look good.
The Jeep is a 2018 JKU Rubi Recon on 37x13.50x20 Toyo MT (tire press at 34)
Here is our alignment printout and it is complete Greek to me. Any help would be great guys.

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Old 03-31-2018, 07:15 PM   #2
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If i'm not mistaken the Toyo's are known to pull left. (Or could be right?) Do a search on the interweb to verify, or someone else will chime in i'm sure.

Do you have a stock or aftermarket steering stabilizer? I think I've also read that high pressure charged aftermarket steering stabilizers can cause this.

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Old 03-31-2018, 07:22 PM
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I have the Falcon nexus 2.2 to eliminate that possibility and I can change settings which I have also done and it doesn’t has any effect to this issue.
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Old 03-31-2018, 09:11 PM   #4
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Do you have a rear adjustable track bar? Your rear toe looks strange now that I look at your alignment sheet again.
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Old 03-31-2018, 11:15 PM
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Everything is adjustable with this lift kit including shocks, Falcon 3.3 and the steering stabilizer.. while driving it seems fine only having major issues while stepping on the skinny pedal. I wonder if the numbers look correct with the alignment??
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Old 03-31-2018, 11:24 PM   #6
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Originally Posted by primetime1267 View Post
Everything is adjustable with this lift kit including shocks, Falcon 3.3 and the steering stabilizer.. while driving it seems fine only having major issues while stepping on the skinny pedal. I wonder if the numbers look correct with the alignment??
It is possible. It appears from your alignment that your rear axle is over to the drivers side, you either need to adjust your rear track bar (if it is an aftermarket adjustable) or you need to buy one so you can adjust your rear axle back to center.
Others should chime in with more comments. I chased a pull for quite a long time and it was a few things contributing to it.
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Old 04-02-2018, 03:20 PM   #7
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Why is there no caster measurements on your print out? Caster is a huge role in determining how a straight axle vehicle drives.

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Old 04-02-2018, 09:23 PM   #8
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Originally Posted by primetime1267 View Post
Hey guys,
Just completed my wifeís build, RK 3.5Ē lift x-factor with drag link and my wife just told me that the Jeep is pulling left when she accelerates away from stop lights. So I went out for a quick drive tonight and it feels like someone is lifting the rear end and pushing you left while accelerating from the stop light. Itís only been out of shop for three days so we havenít driven it much yet but I had them place torque paint on all of the bolts so I could visualize any loosening of bolts and they all look good.
The Jeep is a 2018 JKU Rubi Recon on 37x13.50x20 Toyo MT (tire press at 34)
Here is our alignment printout and it is complete Greek to me. Any help would be great guys.
I have the exact same setup, RK 3.5 X-Factor and Falcon 3.3 shocks on 37s. After a lift, it's normal for the alignment to be off a little. I did the lift myself so I know everything was triple checked and done right. Here are my suggestions:

Check both axles to make sure they are centered. Do the tires stick out evenly on both sides? Sway links and springs should be close to perfectly straight up and down.

Wheels centered in the wheel wells the same on both sides?

Crawl underneath with a tape measure and check the arm lengths. Left and right arms need to be the same.

I have the Falcon 2.2 also. The firm setting is the best with 37s. Soft and medium is too mushy.
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Old 04-03-2018, 10:57 AM   #9
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I have the exact same setup, RK 3.5 X-Factor and Falcon 3.3 shocks on 37s. After a lift, it's normal for the alignment to be off a little. I did the lift myself so I know everything was triple checked and done right. Here are my suggestions:

Check both axles to make sure they are centered. Do the tires stick out evenly on both sides? Sway links and springs should be close to perfectly straight up and down.

Wheels centered in the wheel wells the same on both sides?

Crawl underneath with a tape measure and check the arm lengths. Left and right arms need to be the same.

I have the Falcon 2.2 also. The firm setting is the best with 37s. Soft and medium is too mushy.
Rolled the Jeep already? LOL PS your picture is upside down
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Old 04-03-2018, 10:58 AM   #10
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Why is there no caster measurements on your print out? Caster is a huge role in determining how a straight axle vehicle drives.

Adam C
This. Caster being off can cause wandering steering.
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Old 04-03-2018, 11:48 AM   #11
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Get the caster checked and set. Thatís weird that there was no reading at all.

Set the nexus 2.2 stabilizer on medium. Hard setting it wonít want to return to center on 37s. Soft setting on the street with 37s it can wander a bit, especially with higher tire pressure. Iíd drop a few psi on the tires as well once you get the pulling sorted out.


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Old 04-04-2018, 07:28 AM
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Adam, I didn’t even catch that... Well darn, I may being sending it back to get realigned properly. What do you suggest for caster settings, and do you think my rear tire needs be set more back? thx buddy, Dion
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Old 04-04-2018, 06:29 PM   #13
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If i'm not mistaken the Toyo's are known to pull left. (Or could be right?) Do a search on the interweb to verify, or someone else will chime in i'm sure.

Do you have a stock or aftermarket steering stabilizer? I think I've also read that high pressure charged aftermarket steering stabilizers can cause this.
2 sets of Toyo tires and NEVER any pull.
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Old 04-05-2018, 11:36 AM   #14
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Adam, I didnít even catch that... Well darn, I may being sending it back to get realigned properly. What do you suggest for caster settings, and do you think my rear tire needs be set more back? thx buddy, Dion
It is tough to say about that rear tire without a straight on side shot, isometric shots can be misleading. Bear in mind that the rear wheel moves rearward when suspension is compressed.

Caster on a 3.5" should be 4.2 to 5.5

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Old 04-09-2018, 04:39 PM   #15
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Adam, I didnít even catch that... Well darn, I may being sending it back to get realigned properly. What do you suggest for caster settings, and do you think my rear tire needs be set more back? thx buddy, Dion
Also, your Jeep is really low in the front compared to the rear... Are you sure they put the factory spring isolators back in? That is rather odd looking for an RK lift IMHO.

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