Originally Posted by BlackRockstarr12
Im not sure what a caster is but i do have a 4 inch lift
Simple solution is go get an alignment and read the alignment report. Caster should be mentioned and I would bet at 4" you have a very low caster if they have not corrected the geometry. I owned a TJ that was lifted by the dealer and I ended up selling it as it was too wobbly on the freeway. Now I know it was probably just bad geometry.
Here is a great thread by KJeeper10:
Newby's guide to lifting your JK
He also has another one directly addressing caster. See if you can search and find it.