If its the spindle as suggested above remove the 5 or 6 bolts that hold it to the knuckle, then I put the jam nuts back on to protect the threads of the spindle and hit it on the jam nuts a few times with a deadblow hammer. Broke it loose that way, but I'm redneck when it comes to some things. Just swapped a transmission in the driveway this weekend with just a ratchet strap connected between the roll cage and the gear shifter of a ZF, then rolled it around on a skateboard.