So I'll be installing a 2.5 Teraflex coil lift in the next few weeks. I already have Rock Krawler front lower adjustable control arms waiting to be installed. I'm just wondering how exactly do I "adjust" them after the install. How do I know what is correct and what I'm looking for measurement wise?

Thanks!

 

After you install your 2.5" lift , place an angle finder on top of your upper ball joint and take a reading. (I did a 3" lift on mine and it was 2 degrees & should be between 4.5 - 5.5 degrees.) Then adjust your lower until you reach the proper reading. You should be able to get an aproximate length from the manufacture to start your adjustment from.

 

Rock Krawler recommends a starting length for the front lcs's of 23 1/8. You are going to want to have it up on an alignment machine to get it dialed in perfectly. This measurement is meant for RK lifts, but it should be in the ballpark.

To adjust them you would simply turn the joint counter clock wise for a longer length. Clockwise ( into the arm) would give you a shorter arm length.

 

Best way to check caster is knowing the pinion angle. There's 6 degrees separation between the two
Stock caster is around positive 4 degrees and pinion is positive 2.

The easiest I found and a accurate, there are 2 machined flat circles on each side of the front differential. Place the angle there. Like mentioned RK's specs should get you close. You want the pinion angle around 2 degrees which would give you 4 degrees caster.

More caster is better for drivability but bad for your driveshaft angle.

Shoot for 2 degrees

 

^^^ X2...most accurate way without an alignment rack ^^^

23" eye to eye on the LCA is a good starting point.

 

Yeah that's how I set up my front too. Right @ 4 degrees. For the rear pinion angle, jacked up the pinion to make it level as possible with the drive shaft, adjusted the arms accordingly.

 

With my 2.5" TF coils i just measured my stock CA's and adjusted the new ones to them. No caster angle issues.

 

I just turned my lowers out a couple turns. I was pretty much at TF's lowest settings.
Made a huge difference in handling. Now I hope I don't have vibrations with my double carden.

The ride was horrible. I am guessing I was around 2 maybe 3 degrees.

 

I have my TF LCA's at 23 1/8" and that has my caster at 5.5* and it rides perfectly. It's sort of a trial and error thing but I think anywhere around 4.5 - 6* is pretty decent. As others have said just watch your pinion angle but at only 2.5" of lift you shouldn't have a problem.

 

Unless you run a double carden driveshaft.