Well, it's going to pull the axle to one side slightly, but it's not measureable. I certainly don't notice it while driving.

Curious, to the people who installed these, did you toss the factory spring isolators or did you install them as well ? I'm thinking of putting mine back in, atleast in the front as there is a minor amount of rake still (Unlimited Rubicon). I think this would bump it up to a 4" lift.

 

Here is a photo of mine, 3.25" rough country lift, trimmed fenders, 15x8" Cragar Soft 8's (4" backspace) and Pro Comp Extreme MT 35" tires (measure 33.9")

 

The instructions said to leave the stock spring isolators in place, so that is what I did. I am still waiting to see if the springs are going to sag any once they settle. From what I have been reading, it looks like it takes a couple hundred miles of driving or a good trip off road to get them broken in.

The kit comes with a bracket for the rear track bar and I didn't notice any shifting of the axle up front after installation.

This was the first time I have done any suspension work on a coil sprung Jeep. When the instructions tell you to shift the rear axle to line up the rear track bar. Set the Jeep down on the tires and just push the rear of the body to align everything. After messing with trying to shift the rear axle by pushing on it for over an hour (by this time my buddy and I were getting a little tired and not thinking clearly ) I stumbled onto this almost by accident.

It is probably common knowledge, but I have never seen anyone mention how to actually center the rear axle before. I hope it saves someone else some time messing with it in the future.

I would also recommend renting a set of spring compressors from a place like Autozone. They rent them out for free (you just pay a deposit) and it really helps to get the new springs into place. I was able to get the front driver's side spring in place without using them, but there was no way I could get the passenger side spring in place.