99% of the time its a track bar issue

 

If you have a two door, you need a 2" lift, not a 2.5"..

 

so there is still the potential of driveshaft issues with a TF BB? damn, guess ill just have to be careful im about about to buy a slighty used one off a guy on the forum.

 

on the two door, its over 3", That's a new rear driveshaft, atleast upper control arms.

I'm sure guys will jump on and say they dont have issues. But it can cause issues with that. it might not be now, but it'll happen.

 

If your cruising a 2 door, you might be better off getting a simple BB with pucks and not coils. This way you are assuring yourself of a finite amount of lift. Im no expert but in all my research before I bought my lift, I found that the two doors were capable of 1.5-2 inches of lift before driveshaft angles become a problem. Along with with arms need to correct.
The longer wheelbase of the unlimited allows for more lift before this becomes an issue. My 2.5" TF coil lift gave me into the 3.25"+ range of lift. So if your looking for a few extra inches and no additional parts (at the least right away) then go with a 2 inch spacer lift and stay away from new coils.
On a side note, I have seen some measurements of 2 doors with the 2.5" TF coil lift like I have on mine, that have seen almost 4" of lift (soft top, and all stock bumpers, etc.) So do your homework before you purchase a lift thats only going to give you headaches. There are a ton of threads on here to help.