Thanks for the info, Steve. I've been curious about how much sag I had. I'm at 17.5" for the front (hub to stock flare) and 15 5/8ths in the rear with a half tank of gas. So I'm +/-0 front and -1.375ths at the rear. Time for new leaf springs... which I knew.

A couple of things to remember, you should get as much stuff out of your XJ as you can before measuring. If you've got 200 pounds of tools in the trunk it will affect your lift measurements. Also, a full tank of gas weighs 120 pounds and since it sits behind the rear axle, all of the weight is being carried by that axle.