Rock and roll
Thread Starter
JK Enthusiast
Joined: Nov 2011
Posts: 335
Likes: 0
From: mehoopany pa
I had a guy from a shop in pa here re do all the alignment on the jeep I have the rk 5.5 mid arm lift with the ultimate steering upgrade stock tie rod 37/1250/17 wrangler mtr with 25 psi
JK Freak
Joined: Jun 2011
Posts: 606
Likes: 6
From: Evergreen, CO
Honestly, I'm not being a smartass. But a guy in an alignment shop doesn't really say anything about your settings. For instance, if he set it to the design spec of 4.2 the 4.7 on caster it's very likely not enough for the tire and lift modifications you have. Many times larger tires prefer more toe in. Did he give you a readout?
Thread Starter
JK Enthusiast
Joined: Nov 2011
Posts: 335
Likes: 0
From: mehoopany pa
He's an offroad shop that all he does he set it all with tape measures not alignment rack I'd have to ask him what he set it at but wen he re aligned it it did make handling better
JK Junkie
Joined: Mar 2011
Posts: 2,145
Likes: 4
From: Israel
In addition to good advises that others gave here --
Less than optimal directional stability (and therefore the constant steering wheel corrections) is a characteristic off live axle vehicles.
The reason is that the axles move sideways with each up/down movement. The sideways movements throw the Jeep a bit off line with every little bump on the road or trail.
The relatively tall body of a Jeep adds to the effect, and so does the aerodynamic of a cube.
The wider tires, too, spoil some of the directional stability.
On that list, the greatest contributor is the side movement of the rear axle. Eliminating it meaningfully improves directional stability.
Before I installed the Full Traction CRC, constant steering corrections were part of the driving, and were practically gone after I installed it.
With 4" lift and wider tires, the Jeep behaves noticeably better than when it was stock.
It is still a Jeep, it doesn't behave like a car, but it's a Jeep that can be driven with a light hand on the steering wheel and with much less corrections.
So, whatever tuning you do to improve your jittery steering, you still have a rear live axle on a 5.5" lifted Jeep, and the CRC would improve the steering.
Less than optimal directional stability (and therefore the constant steering wheel corrections) is a characteristic off live axle vehicles.
The reason is that the axles move sideways with each up/down movement. The sideways movements throw the Jeep a bit off line with every little bump on the road or trail.
The relatively tall body of a Jeep adds to the effect, and so does the aerodynamic of a cube.
The wider tires, too, spoil some of the directional stability.
On that list, the greatest contributor is the side movement of the rear axle. Eliminating it meaningfully improves directional stability.
Before I installed the Full Traction CRC, constant steering corrections were part of the driving, and were practically gone after I installed it.
With 4" lift and wider tires, the Jeep behaves noticeably better than when it was stock.
It is still a Jeep, it doesn't behave like a car, but it's a Jeep that can be driven with a light hand on the steering wheel and with much less corrections.
So, whatever tuning you do to improve your jittery steering, you still have a rear live axle on a 5.5" lifted Jeep, and the CRC would improve the steering.
Last edited by GJeep; Apr 4, 2013 at 03:19 AM.
JK Enthusiast
Joined: May 2007
Posts: 207
Likes: 0
From: Virginia
My PSC experience was started along the same lines--I went to 37s with a taller lift and wanted the Jeep to steer better. I have it on my Jeep, it made the on-road handling MUCH worse. It multiplies bump steer and tiny amounts of anything out of alignment. It's great for rock crawling. Its great if you have 40+ tires. Your mileage may vary, but my journey with this mod was not full of rainbows and sunshine. If I had a do-over, this would not be a repeated experience for me. I'm looking at how to retro-fit a TeraFlex stabilizer into my system to tame the PSC ram assist.
JK Enthusiast
Joined: May 2007
Posts: 207
Likes: 0
From: Virginia
In addition to good advises that others gave here --
Less than optimal directional stability (and therefore the constant steering wheel corrections) is a characteristic off live axle vehicles.
The reason is that the axles move sideways with each up/down movement. The sideways movements throw the Jeep a bit off line with every little bump on the road or trail.
The relatively tall body of a Jeep adds to the effect, and so does the aerodynamic of a cube.
The wider tires, too, spoil some of the directional stability.
On that list, the greatest contributor is the side movement of the rear axle. Eliminating it meaningfully improves directional stability.
Before I installed the Full Traction CRC, constant steering corrections were part of the driving, and were practically gone after I installed it.
With 4" lift and wider tires, the Jeep behaves noticeably better than when it was stock.
It is still a Jeep, it doesn't behave like a car, but it's a Jeep that can be driven with a light hand on the steering wheel and with much less corrections.
So, whatever tuning you do to improve your jittery steering, you still have a rear live axle on a 5.5" lifted Jeep, and the CRC would improve the steering.
Less than optimal directional stability (and therefore the constant steering wheel corrections) is a characteristic off live axle vehicles.
The reason is that the axles move sideways with each up/down movement. The sideways movements throw the Jeep a bit off line with every little bump on the road or trail.
The relatively tall body of a Jeep adds to the effect, and so does the aerodynamic of a cube.
The wider tires, too, spoil some of the directional stability.
On that list, the greatest contributor is the side movement of the rear axle. Eliminating it meaningfully improves directional stability.
Before I installed the Full Traction CRC, constant steering corrections were part of the driving, and were practically gone after I installed it.
With 4" lift and wider tires, the Jeep behaves noticeably better than when it was stock.
It is still a Jeep, it doesn't behave like a car, but it's a Jeep that can be driven with a light hand on the steering wheel and with much less corrections.
So, whatever tuning you do to improve your jittery steering, you still have a rear live axle on a 5.5" lifted Jeep, and the CRC would improve the steering.
JK Junkie
Joined: Mar 2011
Posts: 2,145
Likes: 4
From: Israel
The radius arm was replaced with the CRC, the sway bar is stock.
I see no need for any change with the sway bar, as the sway is normal on or off road, maybe a tad more compared to an non-lifted JKU.
I tried emergency maneuvering, and it behaves just fine.
BTW, notice that it takes cutting off a short section of the exhaust pipe (and re-welding, of course), in order to install the left arm of the CRC.
I see no need for any change with the sway bar, as the sway is normal on or off road, maybe a tad more compared to an non-lifted JKU.
I tried emergency maneuvering, and it behaves just fine.
BTW, notice that it takes cutting off a short section of the exhaust pipe (and re-welding, of course), in order to install the left arm of the CRC.
Last edited by GJeep; Apr 4, 2013 at 01:17 PM.