Rear Control Arms adjust question
Thread Starter
JK Junkie
Joined: Oct 2008
Posts: 2,012
Likes: 1
From: Lusby, MD
Rear Control Arms adjust question
Just purchased a set of rear upper and lower JKS control arms.
Working on a '07 JK unlimited Rubicon that has 6" of ift and the stock rear driveshaft installed. (Just an FYI, front OEM upper/lower control arms and oem driveshaft still installed).
My question is:
Obviously by having this much lift with the stock control arms caused the wheelbase to shorten and the coils to nearly touch the fuel tank when slightly flexed. I know from other posts the rear lower arms is what will recenter your axle. Since I really had no idea on how to start the adjustments I added 1" of length to the uppers and 2" of length to the lowers. Of course this pushed the axle to far back to where the coil was nearly touching the trackbar on the frame side.
As a general starting rule, what should I start my adjustments to be? Leave uppers stock length? Only add length to lowers? Shorten uppers to less the OEM length? Any feedback would be appreciated.
Working on a '07 JK unlimited Rubicon that has 6" of ift and the stock rear driveshaft installed. (Just an FYI, front OEM upper/lower control arms and oem driveshaft still installed).
My question is:
Obviously by having this much lift with the stock control arms caused the wheelbase to shorten and the coils to nearly touch the fuel tank when slightly flexed. I know from other posts the rear lower arms is what will recenter your axle. Since I really had no idea on how to start the adjustments I added 1" of length to the uppers and 2" of length to the lowers. Of course this pushed the axle to far back to where the coil was nearly touching the trackbar on the frame side.
As a general starting rule, what should I start my adjustments to be? Leave uppers stock length? Only add length to lowers? Shorten uppers to less the OEM length? Any feedback would be appreciated.
JK Junkie
Joined: Jun 2007
Posts: 2,467
Likes: 1
From: 4 Corners
Get your Jeep level and plumb your axle spring mounts with the bump stops on the frame. Then extend the upper arms equally with shortening the lowers so the pinion is pretty much lined up with the transfer case. From there you can go with the manufacturer's recommendation as to pinion angle. It's not the fastest way, but it'll do a nice job of dialing things in for you.