Spend your money on a better upgrade, get rid of the 247 transfer case and put in a 242. If you plan to drive it, the 247 is (IMHO) a POS. My '04 LTD had a 247, sunk only a couple hundred into it until I figured out how to do the swap. Found a complete donor (Laredo) with ~100,000 mi. and got everything, from shifter to the u-joints. I've put over 100,000 miles on it and it's still going. no special fluid (you knew about that, right?), just ATF4. Select 2WD, Locked 4WD, FT4WD, Locked LO-4WD. Do some research before you commit. My $0.02Can you put a 2 or 3 inch budget boost lift on a 2004 grand cherokee overland full time 4wd without changing anything else.Seen some things about you cant put lift on a full time 4wd,just want to make sure it will be ok.Thanks.