rock Krawler custom legth CA's
Thread Starter
JK Junkie
Joined: Jan 2013
Posts: 3,440
Likes: 0
From: CT
Figured I would share here on JF as well.
I see a lot on the forums people having issues moving the axle back 1" with the X-factor setup. Some people even swapping out to different arms or back to stock. The threads are actually tapped deep enough to cut them down if you have the means. I ordered mine shorter, seeing the issues around.
The rear lowers are slightly longer [than the max Travel lowers] and the uppers adjust down to stock + 1"-1 1/8 max.
I have a 2 door w/ 3.5" coils. The new rear lowers are set to 20 1/4 or 1/2 over stock. Uppers are set to around 18 1/2 which has my pinion -2°
The short arm rides amazing. With the new Pro series Flex Bushings NVH is kept to a min. Better then the stock arms and drop brackets I was running.
Kudos to Rock Krawler, I couldn't be happier. Pics below
I see a lot on the forums people having issues moving the axle back 1" with the X-factor setup. Some people even swapping out to different arms or back to stock. The threads are actually tapped deep enough to cut them down if you have the means. I ordered mine shorter, seeing the issues around.
The rear lowers are slightly longer [than the max Travel lowers] and the uppers adjust down to stock + 1"-1 1/8 max.
I have a 2 door w/ 3.5" coils. The new rear lowers are set to 20 1/4 or 1/2 over stock. Uppers are set to around 18 1/2 which has my pinion -2°
The short arm rides amazing. With the new Pro series Flex Bushings NVH is kept to a min. Better then the stock arms and drop brackets I was running.
Kudos to Rock Krawler, I couldn't be happier. Pics below
Last edited by kjeeper10; Apr 23, 2015 at 03:44 PM.
Thread Starter
JK Junkie
Joined: Jan 2013
Posts: 3,440
Likes: 0
From: CT
My upper arms are not set to the same lengths either. Once lowers are in I placed a jack under the diff to hold where I wanted pinion angle.
Both arms adjusted out to fit the mounts. This removes any bind, bind that might have been present with the stock arms and will prolong bushing life.
Last edited by kjeeper10; Apr 23, 2015 at 04:55 AM.
JK Junkie
Joined: Nov 2011
Posts: 3,863
Likes: 1
From: Bossier City, LA
Yes, coil bowing, track bar bind, swaybar links contacting stops, UCA mounts. Shock body hitting TB bracket. Mostly a 2 door thing but easily addressed with slight modifications. Some shops, people don't follow instructions and just bolt the arms up using RK's numbers. Every jeep is a little different and most likely will need fine tuning. I have the 5/16 drill and tap to move the swaybar back a little. My coils have a slight slant but look good.
My upper arms are not set to the same lengths either. Once lowers are in I placed a jack under the diff to hold where I wanted pinion angle.
Both arms adjusted out to fit the mounts. This removes any bind, bind that might have been present with the stock arms and will prolong bushing life.
My upper arms are not set to the same lengths either. Once lowers are in I placed a jack under the diff to hold where I wanted pinion angle.
Both arms adjusted out to fit the mounts. This removes any bind, bind that might have been present with the stock arms and will prolong bushing life.
Thread Starter
JK Junkie
Joined: Jan 2013
Posts: 3,440
Likes: 0
From: CT
Thanks brother. Yea the Mc Arms like most add 1/2 but can go out further if desired.
Another thing I noticed was RK's front uppers min at 19 1/4.
This forces +1/2 along with the lowers. I set them to 23 1/4 lower, 19 1/4 upper. Coils look perfect but I prob can't run Synergy's sector shaft upgrade. There's only maybe 1/4 inbetween the bracket and coil now. Prob doing Hydro assist anyways
Another thing I noticed was RK's front uppers min at 19 1/4.
This forces +1/2 along with the lowers. I set them to 23 1/4 lower, 19 1/4 upper. Coils look perfect but I prob can't run Synergy's sector shaft upgrade. There's only maybe 1/4 inbetween the bracket and coil now. Prob doing Hydro assist anyways
JK Junkie
Joined: Nov 2011
Posts: 3,863
Likes: 1
From: Bossier City, LA
Thanks brother. Yea the Mc Arms like most add 1/2 but can go out further if desired.
Another thing I noticed was RK's front uppers min at 19 1/4.
This forces +1/2 along with the lowers. I set them to 23 1/4 lower, 19 1/4 upper. Coils look perfect but I prob can't run Synergy's sector shaft upgrade. There's only maybe 1/4 inbetween the bracket and coil now. Prob doing Hydro assist anyways
Another thing I noticed was RK's front uppers min at 19 1/4.
This forces +1/2 along with the lowers. I set them to 23 1/4 lower, 19 1/4 upper. Coils look perfect but I prob can't run Synergy's sector shaft upgrade. There's only maybe 1/4 inbetween the bracket and coil now. Prob doing Hydro assist anyways
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JK Junkie
Joined: Nov 2011
Posts: 3,863
Likes: 1
From: Bossier City, LA
I should be at the same as you nearly. Mine are both shorter then yours by 1/4". I'm going to get a pic with angle finder on it and post it up. Maybe you can tell me. Haven't had alignment done yet as I'm waiting to get the rear on also. When I put the angle on the ground it reads about 89*, when on the flat round spots on the pumpkin it reads about 91*. I'll post pics though
Thread Starter
JK Junkie
Joined: Jan 2013
Posts: 3,440
Likes: 0
From: CT
I should be at the same as you nearly. Mine are both shorter then yours by 1/4". I'm going to get a pic with angle finder on it and post it up. Maybe you can tell me. Haven't had alignment done yet as I'm waiting to get the rear on also. When I put the angle on the ground it reads about 89*, when on the flat round spots on the pumpkin it reads about 91*. I'll post pics though
I believe you would have to subtract that 1° ?which would put pinion at 90° (6° caster)