Re: Converting 2wd to 4wd on 03 WJ
No, you can't. Not to say that it isn't possible,just that it would cost less just to buy another Jeep with 4wd. It would be a huge mechanical undertaking, replacing the transmission, front axle, adding a transfer case, shiftconsole, linkage, wiring, sensors, etc...
Just sell your Jeep and get a new one. Look for the big 4wd shifter on the console, can't miss it.