I recently noticed I had a bent rear lower control arm. I didn't notice any negative driving effects but visually saw it. I plan on replacing it-looks like it was bent going over a rock. I was going to put in JKS fixed length lower arms in. Something a little beefier than OEM. My question is; Good choice? or should I look at something else. Rear arms don't seem to be talked about much.

My rig is a 13 JKU. 2.5 TF coil lift on 35s. OEM drive shafts. Mainly a daily driver/mall crawler. Few off road trips a year.

 

Good question, the JKS fixed length control arms wITH factory style clevite bushings appear to be an excellent beefy option. Looking forward to hearing from anyone that has them.

 

This would be a good opportunity to correct your rear pinion angle if you haven't already after your lift. Getting an adjustable lower CA would allow you to do that.

 

Running only lower arms set longer rotates the pinion down. In order to run a longer fixed lower control arm he will need adjustable uppers to set pinion. The only other option is to run a adjustable lower set to stock. Later add adjustable uppers to set wheelbase and pinion.

 

Doesn't the pinion rotate up when you lift?

Nevermind, I was thinking of it backwards. The lower CA would have to be shorter than OEM.

 

2.5 inches of lift on a JKU doesn't throw the rear pinion out of whack. I have a 3" lift and my rear pinion angle is fine. The only reason I would get the JKS rear lower links is because they are beefy as hell, and have a stock like bushing for smooth ride. I never plan to go over 3" and if I did need to adjust my rear pinion angle I'd get adjustable rear uppers.

Also, the JKS J-Links are same length as factory lower arms, just a beefier alternative to the stock rear lowers.

 

I went with the jks arms, beefy compared to the originals.

 

Are they the same length as the stock arm? Man, those look nice and beefy, and maintenance free!

 

These arms were about 1/8-3/16" of an inch longer from bolt hole to bolt hole. They are noticeably heavy. UPS shipping label was 23 lbs.

 

You would want a arm that is slightly longer to push the axle back to the center of the wheel well. When you lift with factory arms the axles move towards the center of the jeep causing a slight loss of wheelbase. However adding longer lower links and leaving the factory uppers you will rotate the rear pinion down.