I went 3" originally and checked caster when done. It went from the nominal 7.5* to 5.0*, as it should have. You can drive around like this all day but it felt squirrelly to me. To get caster back to where it belongs (7.5*) is easy; just drop a 4.0mm shim behind each LCA. These are about $3.00 at the dealer, p/n 52003976. I also replaced the stock MJ LCAs with the beefier WJ LCAs at the same time. The lift caused about a 1/2" axle shift, so I went with an adjustable track bar to bring it back to center. It drives and handles better lifted than it did stock.